Cleanse Address
POST/cleanse/addresses
The address cleanse API attempts to return the closest matching address for any given address inputs. We also return a number of Match Level indicators that describe the degree to which the suggested address matches the input address. The more impaired the input address, the harder it is to cleanse.
Confidence Score
The confidence score is a number ranging between 0 and 1. Where 1 implies a full match and 0 implies no major elements completely match. Each incorrect, missing or misspelled element will subtract from the overall confidence score.
Deciding on an Acceptable Confidence Score Threshold
Different address cleanse projects can have radically different inputs. However, within each project, the inputs tend to repeat the same errors. For instance, some input datasets may be exclusively inputted manually and be prone to typos. Others may have a persistently missing datapoint such as organistation name or postcode. For this reason, it is important to understand that there is no absolute Confidence Score threshold. Instead, the acceptable confidence score must be determined on a project by project basis based on systematic errors present in the data and business goals.
When determining an acceptable Confidence Score threshold you should load a subset of the dataset into a spreadsheet application like Excel and sort on the score. Scrolling from top-to-bottom you will be able to observe matches from best to worst. As you start to hit the lower quality searches, you will be able to roughly determine:
- Which confidence scores indicate ambigious matches (i.e. up to building level only)
- Which confidence scores indicate a poor or no match (i.e. the nearest matching address is too far from the input address)
Depending on your business goals, you can also use the Match Levels to determine an acceptable match. For instance, do you need to match up to the throroughfare or building name only? Are accurate organisation names an important feature?
Request
Query Parameters
API Key
Your unique identifier that allows access to our APIs.
Begins ak_
. Available from your dashboard
A comma separated list of tags to query over.
Useful if you want to specify the circumstances in which the request was made.
If multiple tags are specified, the response will only comprise of requests for which all the tags are satisfied - i.e. searching "foo,bar"
will only query requests which tagged both "foo"
and "bar"
.
- application/json
Body
required
Freeform address input to cleanse
Optionally specify postal code for the address.
Optionally specify the city or town of the address.
For UK verifications, this should be the "post town" of the address.
For USA verifications, this should be the city of the address.
Optionally specify the county or state of the address.
For UK verifications, we recommend omitting this field as county data is unreliable.
For USA verifications, this should be the state of the address.
Responses
- 200
- 400
- 401
- 429
Success
- application/json
- Schema
- Example (from schema)
Schema
- Address Match
- No Address Match
- Postcode Address File Address
- Multiple Residence Address
- Not Yet Built Address
- PAF Alias Address
- Welsh PAF Address
- United States CASS Verified Address
- MOD1
- MOD2
- The Manor
- 1-2
- A
- 12A
- K
- Victoria House
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- The Manor
- 1-2
- A
- 12A
- K
- Victoria House
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- The Manor
- 1-2
- A
- 12A
- K
- Victoria House
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- The Manor
- 1-2
- A
- 12A
- K
- Victoria House
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- The Manor
- 1-2
- A
- 12A
- K
- Victoria House
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
- MOD1
- MOD2
Possible values: [2000
]
Possible values: [Success
]
result object required
Originally submitted query
match object required
Nearest matching address
Global unique internally generated identifier for an address
Possible values: [paf
]
Indicates the provenance of an address
Possible values: [GBR
, IMN
, JEY
, GGY
]
3 letter country code (ISO 3166-1)
Possible values: [GB
, IM
, JE
, GG
]
2 letter country code (ISO 3166-1)
Possible values: [England
, Scotland
, Wales
, Northern Ireland
, Jersey
, Guernsey
, Isle of Man
]
Full country names (ISO 3166)
Possible values: [en
]
Language represented by 2 letter ISO Code (639-1)
First Address Line. Often contains premise and thoroughfare information. In the case of a commercial premise, the first line is always the full name of the registered organisation. Never empty.
Second Address Line. Often contains thoroughfare and locality information. May be empty
Third address line. May be empty.
Possible values: <= 30 characters
**Filter by Town or City" A Post Town is mandatory for delivery of mail to a Delivery Point. This is not necessarily the nearest town geographically, but a routing instruction to the Royal Mail delivery office sorting mail for that Delivery Point. A Post Town will always be present in every address, and for some Localities the Post Town will be the only locality element present.
Possible values: >= 6 characters
and <= 8 characters
Correctly formatted postcode. Capitalised and spaced.
Since postal, administrative or traditional counties may not apply to some addresses, the county field is designed to return whatever county data is available. Normally, the postal county is returned. If this is not present, the county field will fall back to the administrative county. If the administrative county is also not present, the county field will fall back to the traditional county. May be empty in cases where no administrative, postal or traditional county present.
Short code representing the county or province. May be empty (""
)
UPRN stands for Unique Property Reference Number and is maintained by the Ordnance Survey (OS). Local governments in the UK have allocated a unique number for each land or property.
Up to 12 digits in length.
Multiple Residence premises currently share the same UPRN as the parent premise.
May not be available for a small number of Great Britain addresses due to longer update cycles for Ordnance Survey's AddressBase datasets. Returns empty string "" in these instances.
Although UPRN takes an integer format, we encode and transmit this data as strings. As a 12 digit number, the UPRN can exceed the maximum safe integer Number.MAX_SAFE_INTEGER
in most browsers causing this datapoint to be corrupted.
Take special care when storing UPRN. As a 12 digit identifier, you will need 64 bits to encode every possible UPRN value. This means applications like Excel will corrupt cells containing UPRN values.
UDPRN stands for ‘Unique Delivery Point Reference Number’. Royal Mail assigns a unique UDPRN code for each premise on PAF. Simple, unique reference number for each Delivery Point. Unlikely to be reused when an address expires.
Up to 8-digit numeric code.
A new UDPRN is automatically assigned to each new Delivery Point added to PAF.
umprn object required
A small minority of individual premises (as identified by a UDPRN) may have multiple occupants behind the same letterbox. These are known as Multiple Residence occupants and can be queried via the Multiple Residence dataset. Simple, unique reference number for each Multiple Residence occupant.
Note: this will be an empty string ""
when not used.
string
number
Possible values: >= 2 characters
and <= 4 characters
The first part of a postcode is known as the outward code. e.g. The outward code of ID1 1QD is ID1. Enables mail to be sorted to the correct local area for delivery. This part of the code contains the area and the district to which the mail is to be delivered, e.g. ‘PO1’, ‘SW1A’ or ‘B23’.
Possible values: >= 3 characters
and <= 3 characters
The second part of a postcode is known as the inward code. e.g. The inward code of ID1 1QD is 1QD.
The number identifies the sector in the postal district. The number is followed by 2 letters. The letters then define one or more properties in that sector.
Possible values: <= 35 characters
When the same thoroughfare name reoccurs in a Post town, it may not be possible to make it dependant on a dependant thoroughfare. In this case the thoroughfare is dependant on a locality. For example if we want to find 1 Back Lane in Huddersfield we see that there are three.
Possible values: <= 35 characters
Used to supplement Dependant Locality. A Double Dependant Locality supplied along with a Dependant Locality if the Dependant Locality exists twice in the same locality.
Possible values: <= 80 characters
Also known as the street or road name. In general each Thoroughfare Name will have a separate Postcode. Longer Thoroughfares with high number ranges often have multiple Postcodes covering the entire length of the road, with breaks at suitable points e.g. junctions or natural breaks in the road.
Possible values: <= 80 characters
Used to supplement thoroughfare. When a thoroughfare name is used twice in the same Post Town, the dependant thoroughfare is added to uniquely indentify a delivery point.
Possible values: <= 4 characters
Number to identify premise on a thoroughfare or dependant thoroughfare.
Possible values: <= 50 characters
Name of residential or commercial premise.
Examples:
Possible values: <= 30 characters
When a premise is split into individual units such as flats, apartments or business units. Cannot be present without either building_name or building_number. E.g. Flat 1, A, 10B
Possible values: <= 6 characters
When the PO Box Number field is populated it will contain PO BOX nnnnnn where n represents the PO Box number. Note that the PO Box details can occasionally consist of a combination of numbers and letters. PO Box Numbers are only allocated to Large Users.
Possible values: <= 60 characters
Used to supplment Organisation Name to identify a deparment within the organisation.
Possible values: <= 60 characters
Used to supplment Organisation Name to identify a deparment within the organisation
Possible values: [S
, L
, ``]
This indicates the type of user. It can only take the values 'S' or 'L' indicating small or large respectively. Large User Postcodes. These are assigned to one single address either due to the large volume of mail received at that address, or because a PO Box or Selectapost service has been set up. Small User Postcodes. These identify a group of Delivery Points.
On average there are 19 Delivery Points per Postcode. However this can vary between 1 and, in some cases, 100. There will never be more than 100 Delivery Points on a Postcode.
Small User Organisation Indicator can have the values 'Y' or space. A value of 'Y' indicates that a Small User Organisation is present at this address.
A unique Royal Mail 2-character code (the first numeric & the second alphabetical), which, when added to the Postcode, enables each live Delivery Point to be uniquely identified. Once the Delivery Point is deleted from PAF the DPS may be reused (although they aren’t reused until all remaining Delivery Points in the range have been allocated). The DPS for a Large User is always '1A' as each Large User has its own Postcode.
Possible values: <= 84 characters
A pre-computed string which sensibly combines building_number, building_name and sub_building_name. building_number, building_name and sub_building_name represent raw data from Royal Mail's and can be difficult to parse if you are unaware of how the Postcode Address File premise fields work together. For this reason, we also provide a pre-computed premise field which intelligently gathers these points into a single, simple premise string. This field is ideal if you want to pull premise information and thoroughfare information separately instead of using our address lines data.
The current administrative county to which the postcode has been assigned.
A Unitary Authority name, where one is present. If there is no Unitary Authority, the County name is used. This information is not static, because County boundaries may change due to administrative changes. Data
source: ONS
Postal counties were used for the distribution of mail before the Postcode system was introduced in the 1970s. The Former Postal County was the Administrative County at the time. This data rarely changes. May be empty.
Traditional counties are provided by the Association of British Counties. It is historical data, and can date from the 1800s. May be empty.
The current district/unitary authority to which the postcode has been assigned.
The current administrative/electoral area to which the postcode has been assigned. May be empty for a small number of addresses.
longitude object required
The longitude of the postcode (WGS84/ETRS89).
Can be a positive or negative decimal. E.g. -0.1283983
Returns an empty string if no location data is available.
string
number
latitude object required
The latitude of the postcode (WGS84/ETRS89).
Can be a positive or negative decimal. E.g. 51.5083983
.
Returns an empty string if no location data is available.
string
number
eastings object required
Eastings reference using the Ordnance Survey National Grid reference system.
Northern Ireland Eastings uses the Irish Grid Reference System.
Metres from origin. E.g. 550458
Returns an empty string if no location data is available. Otherwise a number is returned.
string
number
northings object required
Northings reference using the Ordnance Survey National Grid reference system
Northern Ireland Northings uses the Irish Grid Reference System
Metres from origin. E.g. 180458
Returns an empty string if no location data is available. Otherwise a number is returned
string
number
Global unique internally generated identifier for an address
Possible values: [mr
]
Indicates the provenance of an address
Possible values: [GBR
, IMN
, JEY
, GGY
]
3 letter country code (ISO 3166-1)
Possible values: [GB
, IM
, JE
, GG
]
2 letter country code (ISO 3166-1)
Possible values: [England
, Scotland
, Wales
, Northern Ireland
, Jersey
, Guernsey
, Isle of Man
]
Full country names (ISO 3166)
Possible values: [en
]
Language represented by 2 letter ISO Code (639-1)
First Address Line. Often contains premise and thoroughfare information. In the case of a commercial premise, the first line is always the full name of the registered organisation. Never empty.
Second Address Line. Often contains thoroughfare and locality information. May be empty
Third address line. May be empty.
Possible values: <= 30 characters
**Filter by Town or City" A Post Town is mandatory for delivery of mail to a Delivery Point. This is not necessarily the nearest town geographically, but a routing instruction to the Royal Mail delivery office sorting mail for that Delivery Point. A Post Town will always be present in every address, and for some Localities the Post Town will be the only locality element present.
Possible values: >= 6 characters
and <= 8 characters
Correctly formatted postcode. Capitalised and spaced.
Since postal, administrative or traditional counties may not apply to some addresses, the county field is designed to return whatever county data is available. Normally, the postal county is returned. If this is not present, the county field will fall back to the administrative county. If the administrative county is also not present, the county field will fall back to the traditional county. May be empty in cases where no administrative, postal or traditional county present.
Short code representing the county or province. May be empty (""
)
UPRN stands for Unique Property Reference Number and is maintained by the Ordnance Survey (OS). Local governments in the UK have allocated a unique number for each land or property.
Up to 12 digits in length.
Multiple Residence premises currently share the same UPRN as the parent premise.
May not be available for a small number of Great Britain addresses due to longer update cycles for Ordnance Survey's AddressBase datasets. Returns empty string "" in these instances.
Although UPRN takes an integer format, we encode and transmit this data as strings. As a 12 digit number, the UPRN can exceed the maximum safe integer Number.MAX_SAFE_INTEGER
in most browsers causing this datapoint to be corrupted.
Take special care when storing UPRN. As a 12 digit identifier, you will need 64 bits to encode every possible UPRN value. This means applications like Excel will corrupt cells containing UPRN values.
UDPRN stands for ‘Unique Delivery Point Reference Number’. Royal Mail assigns a unique UDPRN code for each premise on PAF. Simple, unique reference number for each Delivery Point. Unlikely to be reused when an address expires.
Up to 8-digit numeric code.
A new UDPRN is automatically assigned to each new Delivery Point added to PAF.
umprn object required
A small minority of individual premises (as identified by a UDPRN) may have multiple occupants behind the same letterbox. These are known as Multiple Residence occupants and can be queried via the Multiple Residence dataset. Simple, unique reference number for each Multiple Residence occupant.
Note: this will be an empty string ""
when not used.
string
number
Possible values: >= 2 characters
and <= 4 characters
The first part of a postcode is known as the outward code. e.g. The outward code of ID1 1QD is ID1. Enables mail to be sorted to the correct local area for delivery. This part of the code contains the area and the district to which the mail is to be delivered, e.g. ‘PO1’, ‘SW1A’ or ‘B23’.
Possible values: >= 3 characters
and <= 3 characters
The second part of a postcode is known as the inward code. e.g. The inward code of ID1 1QD is 1QD.
The number identifies the sector in the postal district. The number is followed by 2 letters. The letters then define one or more properties in that sector.
Possible values: <= 35 characters
When the same thoroughfare name reoccurs in a Post town, it may not be possible to make it dependant on a dependant thoroughfare. In this case the thoroughfare is dependant on a locality. For example if we want to find 1 Back Lane in Huddersfield we see that there are three.
Possible values: <= 35 characters
Used to supplement Dependant Locality. A Double Dependant Locality supplied along with a Dependant Locality if the Dependant Locality exists twice in the same locality.
Possible values: <= 80 characters
Also known as the street or road name. In general each Thoroughfare Name will have a separate Postcode. Longer Thoroughfares with high number ranges often have multiple Postcodes covering the entire length of the road, with breaks at suitable points e.g. junctions or natural breaks in the road.
Possible values: <= 80 characters
Used to supplement thoroughfare. When a thoroughfare name is used twice in the same Post Town, the dependant thoroughfare is added to uniquely indentify a delivery point.
Possible values: <= 4 characters
Number to identify premise on a thoroughfare or dependant thoroughfare.
Possible values: <= 50 characters
Name of residential or commercial premise.
Examples:
Possible values: <= 30 characters
When a premise is split into individual units such as flats, apartments or business units. Cannot be present without either building_name or building_number. E.g. Flat 1, A, 10B
Possible values: <= 6 characters
When the PO Box Number field is populated it will contain PO BOX nnnnnn where n represents the PO Box number. Note that the PO Box details can occasionally consist of a combination of numbers and letters. PO Box Numbers are only allocated to Large Users.
Possible values: <= 60 characters
Used to supplment Organisation Name to identify a deparment within the organisation.
Possible values: <= 60 characters
Used to supplment Organisation Name to identify a deparment within the organisation
Possible values: [S
, L
, ``]
This indicates the type of user. It can only take the values 'S' or 'L' indicating small or large respectively. Large User Postcodes. These are assigned to one single address either due to the large volume of mail received at that address, or because a PO Box or Selectapost service has been set up. Small User Postcodes. These identify a group of Delivery Points.
On average there are 19 Delivery Points per Postcode. However this can vary between 1 and, in some cases, 100. There will never be more than 100 Delivery Points on a Postcode.
Small User Organisation Indicator can have the values 'Y' or space. A value of 'Y' indicates that a Small User Organisation is present at this address.
A unique Royal Mail 2-character code (the first numeric & the second alphabetical), which, when added to the Postcode, enables each live Delivery Point to be uniquely identified. Once the Delivery Point is deleted from PAF the DPS may be reused (although they aren’t reused until all remaining Delivery Points in the range have been allocated). The DPS for a Large User is always '1A' as each Large User has its own Postcode.
Possible values: <= 84 characters
A pre-computed string which sensibly combines building_number, building_name and sub_building_name. building_number, building_name and sub_building_name represent raw data from Royal Mail's and can be difficult to parse if you are unaware of how the Postcode Address File premise fields work together. For this reason, we also provide a pre-computed premise field which intelligently gathers these points into a single, simple premise string. This field is ideal if you want to pull premise information and thoroughfare information separately instead of using our address lines data.
The current administrative county to which the postcode has been assigned.
A Unitary Authority name, where one is present. If there is no Unitary Authority, the County name is used. This information is not static, because County boundaries may change due to administrative changes. Data
source: ONS
Postal counties were used for the distribution of mail before the Postcode system was introduced in the 1970s. The Former Postal County was the Administrative County at the time. This data rarely changes. May be empty.
Traditional counties are provided by the Association of British Counties. It is historical data, and can date from the 1800s. May be empty.
The current district/unitary authority to which the postcode has been assigned.
The current administrative/electoral area to which the postcode has been assigned. May be empty for a small number of addresses.
longitude object required
The longitude of the postcode (WGS84/ETRS89).
Can be a positive or negative decimal. E.g. -0.1283983
Returns an empty string if no location data is available.
string
number
latitude object required
The latitude of the postcode (WGS84/ETRS89).
Can be a positive or negative decimal. E.g. 51.5083983
.
Returns an empty string if no location data is available.
string
number
eastings object required
Eastings reference using the Ordnance Survey National Grid reference system.
Northern Ireland Eastings uses the Irish Grid Reference System.
Metres from origin. E.g. 550458
Returns an empty string if no location data is available. Otherwise a number is returned.
string
number
northings object required
Northings reference using the Ordnance Survey National Grid reference system
Northern Ireland Northings uses the Irish Grid Reference System
Metres from origin. E.g. 180458
Returns an empty string if no location data is available. Otherwise a number is returned
string
number
Global unique internally generated identifier for an address
Possible values: [nyb
]
Indicates the provenance of an address
Possible values: [GBR
, IMN
, JEY
, GGY
]
3 letter country code (ISO 3166-1)
Possible values: [GB
, IM
, JE
, GG
]
2 letter country code (ISO 3166-1)
Possible values: [England
, Scotland
, Wales
, Northern Ireland
, Jersey
, Guernsey
, Isle of Man
]
Full country names (ISO 3166)
Possible values: [en
]
Language represented by 2 letter ISO Code (639-1)
First Address Line. Often contains premise and thoroughfare information. In the case of a commercial premise, the first line is always the full name of the registered organisation. Never empty.
Second Address Line. Often contains thoroughfare and locality information. May be empty
Third address line. May be empty.
Possible values: <= 30 characters
**Filter by Town or City" A Post Town is mandatory for delivery of mail to a Delivery Point. This is not necessarily the nearest town geographically, but a routing instruction to the Royal Mail delivery office sorting mail for that Delivery Point. A Post Town will always be present in every address, and for some Localities the Post Town will be the only locality element present.
Possible values: >= 6 characters
and <= 8 characters
Correctly formatted postcode. Capitalised and spaced.
Since postal, administrative or traditional counties may not apply to some addresses, the county field is designed to return whatever county data is available. Normally, the postal county is returned. If this is not present, the county field will fall back to the administrative county. If the administrative county is also not present, the county field will fall back to the traditional county. May be empty in cases where no administrative, postal or traditional county present.
Short code representing the county or province. May be empty (""
)
UPRN stands for Unique Property Reference Number and is maintained by the Ordnance Survey (OS). Local governments in the UK have allocated a unique number for each land or property.
Up to 12 digits in length.
Multiple Residence premises currently share the same UPRN as the parent premise.
May not be available for a small number of Great Britain addresses due to longer update cycles for Ordnance Survey's AddressBase datasets. Returns empty string "" in these instances.
Although UPRN takes an integer format, we encode and transmit this data as strings. As a 12 digit number, the UPRN can exceed the maximum safe integer Number.MAX_SAFE_INTEGER
in most browsers causing this datapoint to be corrupted.
Take special care when storing UPRN. As a 12 digit identifier, you will need 64 bits to encode every possible UPRN value. This means applications like Excel will corrupt cells containing UPRN values.
UDPRN stands for ‘Unique Delivery Point Reference Number’. Royal Mail assigns a unique UDPRN code for each premise on PAF. Simple, unique reference number for each Delivery Point. Unlikely to be reused when an address expires.
Up to 8-digit numeric code.
A new UDPRN is automatically assigned to each new Delivery Point added to PAF.
umprn object required
A small minority of individual premises (as identified by a UDPRN) may have multiple occupants behind the same letterbox. These are known as Multiple Residence occupants and can be queried via the Multiple Residence dataset. Simple, unique reference number for each Multiple Residence occupant.
Note: this will be an empty string ""
when not used.
string
number
Possible values: >= 2 characters
and <= 4 characters
The first part of a postcode is known as the outward code. e.g. The outward code of ID1 1QD is ID1. Enables mail to be sorted to the correct local area for delivery. This part of the code contains the area and the district to which the mail is to be delivered, e.g. ‘PO1’, ‘SW1A’ or ‘B23’.
Possible values: >= 3 characters
and <= 3 characters
The second part of a postcode is known as the inward code. e.g. The inward code of ID1 1QD is 1QD.
The number identifies the sector in the postal district. The number is followed by 2 letters. The letters then define one or more properties in that sector.
Possible values: <= 35 characters
When the same thoroughfare name reoccurs in a Post town, it may not be possible to make it dependant on a dependant thoroughfare. In this case the thoroughfare is dependant on a locality. For example if we want to find 1 Back Lane in Huddersfield we see that there are three.
Possible values: <= 35 characters
Used to supplement Dependant Locality. A Double Dependant Locality supplied along with a Dependant Locality if the Dependant Locality exists twice in the same locality.
Possible values: <= 80 characters
Also known as the street or road name. In general each Thoroughfare Name will have a separate Postcode. Longer Thoroughfares with high number ranges often have multiple Postcodes covering the entire length of the road, with breaks at suitable points e.g. junctions or natural breaks in the road.
Possible values: <= 80 characters
Used to supplement thoroughfare. When a thoroughfare name is used twice in the same Post Town, the dependant thoroughfare is added to uniquely indentify a delivery point.
Possible values: <= 4 characters
Number to identify premise on a thoroughfare or dependant thoroughfare.
Possible values: <= 50 characters
Name of residential or commercial premise.
Examples:
Possible values: <= 30 characters
When a premise is split into individual units such as flats, apartments or business units. Cannot be present without either building_name or building_number. E.g. Flat 1, A, 10B
Possible values: <= 6 characters
When the PO Box Number field is populated it will contain PO BOX nnnnnn where n represents the PO Box number. Note that the PO Box details can occasionally consist of a combination of numbers and letters. PO Box Numbers are only allocated to Large Users.
Possible values: <= 60 characters
Used to supplment Organisation Name to identify a deparment within the organisation.
Possible values: <= 60 characters
Used to supplment Organisation Name to identify a deparment within the organisation
Possible values: [S
, L
, ``]
This indicates the type of user. It can only take the values 'S' or 'L' indicating small or large respectively. Large User Postcodes. These are assigned to one single address either due to the large volume of mail received at that address, or because a PO Box or Selectapost service has been set up. Small User Postcodes. These identify a group of Delivery Points.
On average there are 19 Delivery Points per Postcode. However this can vary between 1 and, in some cases, 100. There will never be more than 100 Delivery Points on a Postcode.
Small User Organisation Indicator can have the values 'Y' or space. A value of 'Y' indicates that a Small User Organisation is present at this address.
A unique Royal Mail 2-character code (the first numeric & the second alphabetical), which, when added to the Postcode, enables each live Delivery Point to be uniquely identified. Once the Delivery Point is deleted from PAF the DPS may be reused (although they aren’t reused until all remaining Delivery Points in the range have been allocated). The DPS for a Large User is always '1A' as each Large User has its own Postcode.
Possible values: <= 84 characters
A pre-computed string which sensibly combines building_number, building_name and sub_building_name. building_number, building_name and sub_building_name represent raw data from Royal Mail's and can be difficult to parse if you are unaware of how the Postcode Address File premise fields work together. For this reason, we also provide a pre-computed premise field which intelligently gathers these points into a single, simple premise string. This field is ideal if you want to pull premise information and thoroughfare information separately instead of using our address lines data.
The current administrative county to which the postcode has been assigned.
A Unitary Authority name, where one is present. If there is no Unitary Authority, the County name is used. This information is not static, because County boundaries may change due to administrative changes. Data
source: ONS
Postal counties were used for the distribution of mail before the Postcode system was introduced in the 1970s. The Former Postal County was the Administrative County at the time. This data rarely changes. May be empty.
Traditional counties are provided by the Association of British Counties. It is historical data, and can date from the 1800s. May be empty.
The current district/unitary authority to which the postcode has been assigned.
The current administrative/electoral area to which the postcode has been assigned. May be empty for a small number of addresses.
longitude object required
The longitude of the postcode (WGS84/ETRS89).
Can be a positive or negative decimal. E.g. -0.1283983
Returns an empty string if no location data is available.
string
number
latitude object required
The latitude of the postcode (WGS84/ETRS89).
Can be a positive or negative decimal. E.g. 51.5083983
.
Returns an empty string if no location data is available.
string
number
eastings object required
Eastings reference using the Ordnance Survey National Grid reference system.
Northern Ireland Eastings uses the Irish Grid Reference System.
Metres from origin. E.g. 550458
Returns an empty string if no location data is available. Otherwise a number is returned.
string
number
northings object required
Northings reference using the Ordnance Survey National Grid reference system
Northern Ireland Northings uses the Irish Grid Reference System
Metres from origin. E.g. 180458
Returns an empty string if no location data is available. Otherwise a number is returned
string
number
Global unique internally generated identifier for an address
Possible values: [pafa
]
Indicates the provenance of an address
Possible values: [GBR
, IMN
, JEY
, GGY
]
3 letter country code (ISO 3166-1)
Possible values: [GB
, IM
, JE
, GG
]
2 letter country code (ISO 3166-1)
Possible values: [England
, Scotland
, Wales
, Northern Ireland
, Jersey
, Guernsey
, Isle of Man
]
Full country names (ISO 3166)
Possible values: [en
]
Language represented by 2 letter ISO Code (639-1)
First Address Line. Often contains premise and thoroughfare information. In the case of a commercial premise, the first line is always the full name of the registered organisation. Never empty.
Second Address Line. Often contains thoroughfare and locality information. May be empty
Third address line. May be empty.
Possible values: <= 30 characters
**Filter by Town or City" A Post Town is mandatory for delivery of mail to a Delivery Point. This is not necessarily the nearest town geographically, but a routing instruction to the Royal Mail delivery office sorting mail for that Delivery Point. A Post Town will always be present in every address, and for some Localities the Post Town will be the only locality element present.
Possible values: >= 6 characters
and <= 8 characters
Correctly formatted postcode. Capitalised and spaced.
Since postal, administrative or traditional counties may not apply to some addresses, the county field is designed to return whatever county data is available. Normally, the postal county is returned. If this is not present, the county field will fall back to the administrative county. If the administrative county is also not present, the county field will fall back to the traditional county. May be empty in cases where no administrative, postal or traditional county present.
Short code representing the county or province. May be empty (""
)
UPRN stands for Unique Property Reference Number and is maintained by the Ordnance Survey (OS). Local governments in the UK have allocated a unique number for each land or property.
Up to 12 digits in length.
Multiple Residence premises currently share the same UPRN as the parent premise.
May not be available for a small number of Great Britain addresses due to longer update cycles for Ordnance Survey's AddressBase datasets. Returns empty string "" in these instances.
Although UPRN takes an integer format, we encode and transmit this data as strings. As a 12 digit number, the UPRN can exceed the maximum safe integer Number.MAX_SAFE_INTEGER
in most browsers causing this datapoint to be corrupted.
Take special care when storing UPRN. As a 12 digit identifier, you will need 64 bits to encode every possible UPRN value. This means applications like Excel will corrupt cells containing UPRN values.
UDPRN stands for ‘Unique Delivery Point Reference Number’. Royal Mail assigns a unique UDPRN code for each premise on PAF. Simple, unique reference number for each Delivery Point. Unlikely to be reused when an address expires.
Up to 8-digit numeric code.
A new UDPRN is automatically assigned to each new Delivery Point added to PAF.
umprn object required
A small minority of individual premises (as identified by a UDPRN) may have multiple occupants behind the same letterbox. These are known as Multiple Residence occupants and can be queried via the Multiple Residence dataset. Simple, unique reference number for each Multiple Residence occupant.
Note: this will be an empty string ""
when not used.
string
number
Possible values: >= 2 characters
and <= 4 characters
The first part of a postcode is known as the outward code. e.g. The outward code of ID1 1QD is ID1. Enables mail to be sorted to the correct local area for delivery. This part of the code contains the area and the district to which the mail is to be delivered, e.g. ‘PO1’, ‘SW1A’ or ‘B23’.
Possible values: >= 3 characters
and <= 3 characters
The second part of a postcode is known as the inward code. e.g. The inward code of ID1 1QD is 1QD.
The number identifies the sector in the postal district. The number is followed by 2 letters. The letters then define one or more properties in that sector.
Possible values: <= 35 characters
When the same thoroughfare name reoccurs in a Post town, it may not be possible to make it dependant on a dependant thoroughfare. In this case the thoroughfare is dependant on a locality. For example if we want to find 1 Back Lane in Huddersfield we see that there are three.
Possible values: <= 35 characters
Used to supplement Dependant Locality. A Double Dependant Locality supplied along with a Dependant Locality if the Dependant Locality exists twice in the same locality.
Possible values: <= 80 characters
Also known as the street or road name. In general each Thoroughfare Name will have a separate Postcode. Longer Thoroughfares with high number ranges often have multiple Postcodes covering the entire length of the road, with breaks at suitable points e.g. junctions or natural breaks in the road.
Possible values: <= 80 characters
Used to supplement thoroughfare. When a thoroughfare name is used twice in the same Post Town, the dependant thoroughfare is added to uniquely indentify a delivery point.
Possible values: <= 4 characters
Number to identify premise on a thoroughfare or dependant thoroughfare.
Possible values: <= 50 characters
Name of residential or commercial premise.
Examples:
Possible values: <= 30 characters
When a premise is split into individual units such as flats, apartments or business units. Cannot be present without either building_name or building_number. E.g. Flat 1, A, 10B
Possible values: <= 6 characters
When the PO Box Number field is populated it will contain PO BOX nnnnnn where n represents the PO Box number. Note that the PO Box details can occasionally consist of a combination of numbers and letters. PO Box Numbers are only allocated to Large Users.
Possible values: <= 60 characters
Used to supplment Organisation Name to identify a deparment within the organisation.
Possible values: <= 60 characters
Used to supplment Organisation Name to identify a deparment within the organisation
Possible values: [S
, L
, ``]
This indicates the type of user. It can only take the values 'S' or 'L' indicating small or large respectively. Large User Postcodes. These are assigned to one single address either due to the large volume of mail received at that address, or because a PO Box or Selectapost service has been set up. Small User Postcodes. These identify a group of Delivery Points.
On average there are 19 Delivery Points per Postcode. However this can vary between 1 and, in some cases, 100. There will never be more than 100 Delivery Points on a Postcode.
Small User Organisation Indicator can have the values 'Y' or space. A value of 'Y' indicates that a Small User Organisation is present at this address.
A unique Royal Mail 2-character code (the first numeric & the second alphabetical), which, when added to the Postcode, enables each live Delivery Point to be uniquely identified. Once the Delivery Point is deleted from PAF the DPS may be reused (although they aren’t reused until all remaining Delivery Points in the range have been allocated). The DPS for a Large User is always '1A' as each Large User has its own Postcode.
Possible values: <= 84 characters
A pre-computed string which sensibly combines building_number, building_name and sub_building_name. building_number, building_name and sub_building_name represent raw data from Royal Mail's and can be difficult to parse if you are unaware of how the Postcode Address File premise fields work together. For this reason, we also provide a pre-computed premise field which intelligently gathers these points into a single, simple premise string. This field is ideal if you want to pull premise information and thoroughfare information separately instead of using our address lines data.
The current administrative county to which the postcode has been assigned.
A Unitary Authority name, where one is present. If there is no Unitary Authority, the County name is used. This information is not static, because County boundaries may change due to administrative changes. Data
source: ONS
Postal counties were used for the distribution of mail before the Postcode system was introduced in the 1970s. The Former Postal County was the Administrative County at the time. This data rarely changes. May be empty.
Traditional counties are provided by the Association of British Counties. It is historical data, and can date from the 1800s. May be empty.
The current district/unitary authority to which the postcode has been assigned.
The current administrative/electoral area to which the postcode has been assigned. May be empty for a small number of addresses.
longitude object required
The longitude of the postcode (WGS84/ETRS89).
Can be a positive or negative decimal. E.g. -0.1283983
Returns an empty string if no location data is available.
string
number
latitude object required
The latitude of the postcode (WGS84/ETRS89).
Can be a positive or negative decimal. E.g. 51.5083983
.
Returns an empty string if no location data is available.
string
number
eastings object required
Eastings reference using the Ordnance Survey National Grid reference system.
Northern Ireland Eastings uses the Irish Grid Reference System.
Metres from origin. E.g. 550458
Returns an empty string if no location data is available. Otherwise a number is returned.
string
number
northings object required
Northings reference using the Ordnance Survey National Grid reference system
Northern Ireland Northings uses the Irish Grid Reference System
Metres from origin. E.g. 180458
Returns an empty string if no location data is available. Otherwise a number is returned
string
number
Global unique internally generated identifier for an address
Possible values: [pafw
]
Indicates the provenance of an address
Possible values: [GBR
]
3 letter country code (ISO 3166-1)
Possible values: [GB
]
2 letter country code (ISO 3166-1)
Possible values: [Wales
]
Full country names (ISO 3166)
Possible values: [cy
]
Language represented by 2 letter ISO Code (639-1)
First Address Line. Often contains premise and thoroughfare information. In the case of a commercial premise, the first line is always the full name of the registered organisation. Never empty.
Second Address Line. Often contains thoroughfare and locality information. May be empty
Third address line. May be empty.
Possible values: <= 30 characters
**Filter by Town or City" A Post Town is mandatory for delivery of mail to a Delivery Point. This is not necessarily the nearest town geographically, but a routing instruction to the Royal Mail delivery office sorting mail for that Delivery Point. A Post Town will always be present in every address, and for some Localities the Post Town will be the only locality element present.
Possible values: >= 6 characters
and <= 8 characters
Correctly formatted postcode. Capitalised and spaced.
Since postal, administrative or traditional counties may not apply to some addresses, the county field is designed to return whatever county data is available. Normally, the postal county is returned. If this is not present, the county field will fall back to the administrative county. If the administrative county is also not present, the county field will fall back to the traditional county. May be empty in cases where no administrative, postal or traditional county present.
Short code representing the county or province. May be empty (""
)
UPRN stands for Unique Property Reference Number and is maintained by the Ordnance Survey (OS). Local governments in the UK have allocated a unique number for each land or property.
Up to 12 digits in length.
Multiple Residence premises currently share the same UPRN as the parent premise.
May not be available for a small number of Great Britain addresses due to longer update cycles for Ordnance Survey's AddressBase datasets. Returns empty string "" in these instances.
Although UPRN takes an integer format, we encode and transmit this data as strings. As a 12 digit number, the UPRN can exceed the maximum safe integer Number.MAX_SAFE_INTEGER
in most browsers causing this datapoint to be corrupted.
Take special care when storing UPRN. As a 12 digit identifier, you will need 64 bits to encode every possible UPRN value. This means applications like Excel will corrupt cells containing UPRN values.
UDPRN stands for ‘Unique Delivery Point Reference Number’. Royal Mail assigns a unique UDPRN code for each premise on PAF. Simple, unique reference number for each Delivery Point. Unlikely to be reused when an address expires.
Up to 8-digit numeric code.
A new UDPRN is automatically assigned to each new Delivery Point added to PAF.
umprn object required
A small minority of individual premises (as identified by a UDPRN) may have multiple occupants behind the same letterbox. These are known as Multiple Residence occupants and can be queried via the Multiple Residence dataset. Simple, unique reference number for each Multiple Residence occupant.
Note: this will be an empty string ""
when not used.
string
number
Possible values: >= 2 characters
and <= 4 characters
The first part of a postcode is known as the outward code. e.g. The outward code of ID1 1QD is ID1. Enables mail to be sorted to the correct local area for delivery. This part of the code contains the area and the district to which the mail is to be delivered, e.g. ‘PO1’, ‘SW1A’ or ‘B23’.
Possible values: >= 3 characters
and <= 3 characters
The second part of a postcode is known as the inward code. e.g. The inward code of ID1 1QD is 1QD.
The number identifies the sector in the postal district. The number is followed by 2 letters. The letters then define one or more properties in that sector.
Possible values: <= 35 characters
When the same thoroughfare name reoccurs in a Post town, it may not be possible to make it dependant on a dependant thoroughfare. In this case the thoroughfare is dependant on a locality. For example if we want to find 1 Back Lane in Huddersfield we see that there are three.
Possible values: <= 35 characters
Used to supplement Dependant Locality. A Double Dependant Locality supplied along with a Dependant Locality if the Dependant Locality exists twice in the same locality.
Possible values: <= 80 characters
Also known as the street or road name. In general each Thoroughfare Name will have a separate Postcode. Longer Thoroughfares with high number ranges often have multiple Postcodes covering the entire length of the road, with breaks at suitable points e.g. junctions or natural breaks in the road.
Possible values: <= 80 characters
Used to supplement thoroughfare. When a thoroughfare name is used twice in the same Post Town, the dependant thoroughfare is added to uniquely indentify a delivery point.
Possible values: <= 4 characters
Number to identify premise on a thoroughfare or dependant thoroughfare.
Possible values: <= 50 characters
Name of residential or commercial premise.
Examples:
Possible values: <= 30 characters
When a premise is split into individual units such as flats, apartments or business units. Cannot be present without either building_name or building_number. E.g. Flat 1, A, 10B
Possible values: <= 6 characters
When the PO Box Number field is populated it will contain PO BOX nnnnnn where n represents the PO Box number. Note that the PO Box details can occasionally consist of a combination of numbers and letters. PO Box Numbers are only allocated to Large Users.
Possible values: <= 60 characters
Used to supplment Organisation Name to identify a deparment within the organisation.
Possible values: <= 60 characters
Used to supplment Organisation Name to identify a deparment within the organisation
Possible values: [S
, L
, ``]
This indicates the type of user. It can only take the values 'S' or 'L' indicating small or large respectively. Large User Postcodes. These are assigned to one single address either due to the large volume of mail received at that address, or because a PO Box or Selectapost service has been set up. Small User Postcodes. These identify a group of Delivery Points.
On average there are 19 Delivery Points per Postcode. However this can vary between 1 and, in some cases, 100. There will never be more than 100 Delivery Points on a Postcode.
Small User Organisation Indicator can have the values 'Y' or space. A value of 'Y' indicates that a Small User Organisation is present at this address.
A unique Royal Mail 2-character code (the first numeric & the second alphabetical), which, when added to the Postcode, enables each live Delivery Point to be uniquely identified. Once the Delivery Point is deleted from PAF the DPS may be reused (although they aren’t reused until all remaining Delivery Points in the range have been allocated). The DPS for a Large User is always '1A' as each Large User has its own Postcode.
Possible values: <= 84 characters
A pre-computed string which sensibly combines building_number, building_name and sub_building_name. building_number, building_name and sub_building_name represent raw data from Royal Mail's and can be difficult to parse if you are unaware of how the Postcode Address File premise fields work together. For this reason, we also provide a pre-computed premise field which intelligently gathers these points into a single, simple premise string. This field is ideal if you want to pull premise information and thoroughfare information separately instead of using our address lines data.
The current administrative county to which the postcode has been assigned.
A Unitary Authority name, where one is present. If there is no Unitary Authority, the County name is used. This information is not static, because County boundaries may change due to administrative changes. Data
source: ONS
Postal counties were used for the distribution of mail before the Postcode system was introduced in the 1970s. The Former Postal County was the Administrative County at the time. This data rarely changes. May be empty.
Traditional counties are provided by the Association of British Counties. It is historical data, and can date from the 1800s. May be empty.
The current district/unitary authority to which the postcode has been assigned.
The current administrative/electoral area to which the postcode has been assigned. May be empty for a small number of addresses.
longitude object required
The longitude of the postcode (WGS84/ETRS89).
Can be a positive or negative decimal. E.g. -0.1283983
Returns an empty string if no location data is available.
string
number
latitude object required
The latitude of the postcode (WGS84/ETRS89).
Can be a positive or negative decimal. E.g. 51.5083983
.
Returns an empty string if no location data is available.
string
number
eastings object required
Eastings reference using the Ordnance Survey National Grid reference system.
Northern Ireland Eastings uses the Irish Grid Reference System.
Metres from origin. E.g. 550458
Returns an empty string if no location data is available. Otherwise a number is returned.
string
number
northings object required
Northings reference using the Ordnance Survey National Grid reference system
Northern Ireland Northings uses the Irish Grid Reference System
Metres from origin. E.g. 180458
Returns an empty string if no location data is available. Otherwise a number is returned
string
number
Primary delivery address
Secondary address information
Additional secondary address information
Area code
Data required to perform a Carrier Route sort
Character following the 5- or 9-digit ZIP Code
City name
City Abbreviation. Empty string if not present
Identifies the Congressional District. Empty string if not present
ISO3166 country code. Empty string if not present
Name of the county
Daylight saving time indicator
Last 2 digits of the primary street address number or Post Office™ box
DPV Confirmation code. Possible values: 'Y' (Yes), 'S' (Suspicious), 'D' (No).
DPV CMRA code. Possible values: 'Y' (Yes), 'N' (No).
DPV Footnotes. Empty string if not present
False Positive Indicator from the DPV lookup. Possible values: 'Y' (Yes), 'N' (No), ' ' (Space). Empty string if not present
DPV NoStat code. Empty string if not present
DPV Vacant code. Empty string if not present
Enhanced Line of Travel
finance_number object required
Internal accounting number used by the USPS. Empty string if not present
string
number
Federal Information Processing Standard code for a county. Empty string if not present
Company name in a business address
Letter codes returned by ZIP + 4® encoding. Empty string if not present
Indicates whether the address was geo-coded. Possible values: 'Y' (Yes), 'N' (No).
Indicates whether a record may benefit from LACS processing. Possible values: 'L' (Yes), ' ' (No).
LACSLink Footnote. Empty string if not present
LACSLink Indicator. Empty string if not present
latitude object required
Latitude of the encoded address. Empty string if not present
string
number
longitude object required
Longitude of the encoded address. Empty string if not present
string
number
Information if a PMB is found in an address. Empty string if not present
parsed_pmb_number object required
Information if a PMB is found in an address. Empty string if not present
string
number
parsed_post_directional object required
Notation following the street name indicating street direction. Empty string if not present
string
number
Notation preceding the street name indicating street direction. Empty string if not present
parsed_primary_number object required
Number preceding the street name. Empty string if not present
string
number
Street name. Empty string if not present
Part of the delivery address line following the street name. Empty string if not present
Identification of the secondary address unit. Empty string if not present
Apartment or suite number. Empty string if not present
Reserved for future use. Empty string if not present
Type of address record (Street, PO Box, High-rise, etc.)
Additional secondary address information. Empty string if not present
Standard two-letter state abbreviation
Results of the SuiteLink lookup. Possible values: ' ' (Space), '00' (Double Zero), 'A' (A). Empty string if not present
Time zone. Empty string if not present
Urban name required in the address of all mail being delivered to Puerto Rico. Empty string if not present
5-digit ZIP Code™ and the four additional digits
Possible values: <= 10
The number of addresses we matched to the input. We return the closest match by default.
Possible values: <= 1
A score represented as number between 1 and 0. Fit compares the address elements present in your query against the matching address elements. It does not incorporate elements you have not presented in the score. A partial address (e.g. 12 Pye Green Road) will have a fit of 1 even though it is missing post town and postcode. Its confidence score will be less than 1 however because it is missing some crucial elements.
Possible values: <= 1
A confidence score represented as number between 1 and 0. 1 indicates a full match. 0 indicates no complete matching elements.
Possible values: [FULL
, PARTIAL
, INCORRECT
, MISSING
, NA
]
Match indicator for the organisation
Possible values: [FULL
, PARTIAL
, INCORRECT
, MISSING
, NA
]
Match indicator for the premise
Possible values: [FULL
, PARTIAL
, INCORRECT
, MISSING
, NA
]
Match indicator for the postcode
Possible values: [FULL
, PARTIAL
, INCORRECT
, MISSING
, NA
]
Match indicator for the street
Possible values: [FULL
, PARTIAL
, INCORRECT
, MISSING
, NA
]
Match indicator for the locality
Possible values: [FULL
, PARTIAL
, INCORRECT
, MISSING
, NA
]
Match indicator for the post_town
Originally submitted query
Possible values: [null
]
Nearest matching address
Possible values: [0
]
Possible values: [0
]
Possible values: [0
]
Possible values: [NO_MATCH
]
Possible values: [NO_MATCH
]
Possible values: [NO_MATCH
]
Possible values: [NO_MATCH
]
Possible values: [NO_MATCH
]
Possible values: [NO_MATCH
]
{
"code": 2000,
"message": "Success",
"result": {}
}
Bad Request
- application/json
- Schema
- Example (from schema)
Schema
- Array [
- ]
API Response Code. Non 2xxx
code indicates a failure. This code will provide a more specific reason when a failure occurs and facilitates debugging.
Human readable error message supplied with every error response.
errors object[]
Indicates location of error in request query or URL parameter
Indicates location of error in request query or URL parameter
{
"code": 0,
"message": "string",
"errors": [
{
"message": "should have required property 'type'",
"path": ".query.type",
"errorCode": "required.openapi.validation"
}
]
}
Unauthorized
- application/json
- Schema
- Example (from schema)
Schema
API Response Code. Non 2xxx
code indicates a failure. This code will provide a more specific reason when a failure occurs and facilitates debugging.
Human readable error message supplied with every error response.
{
"code": 0,
"message": "string"
}
Rate Limited
- application/json
- Schema
- Example (from schema)
Schema
API Response Code. Non 2xxx
code indicates a failure. This code will provide a more specific reason when a failure occurs and facilitates debugging.
Human readable error message supplied with every error response.
{
"code": 0,
"message": "string"
}