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A comprehensive suite of easy to use, up to date, free, if not affordable, address postcode APIs.
We’re not just a leading UK postcode API lookup service, we’re so much more. We are approved licenced resellers for Ordnance Survey and Royal Mail and manage, maintain and link to a lot of other data including Companies House, Directors at Home, Police, Government, Ordnance Survey and Royal Mail’s Postcode Address File (PAF) & Multi Residency files.
We essentially provide information services delivered through one of several means: you taking out a licence and downloading comma separate files (CSV, Excel, etc), you uploading data to our servers for enhancement & cleaning, you sending us requests via our postcode API or you simply surfing our websites.
Well over 30 million verified UK address records!
No need to store and process these large cumbersome postcode data files yourself, no need for labour intensive processing of updates and changes or otherwise keeping on top of data decay, we take care of all of this inhouse, which must be a considerable time saving benefit for you?
Just some of the applications:
Requests to the API should be made over HTTPS so all traffic is encrypted.
The API responds to different methods depending on the endpoint.
| Method | Usage |
| GET | To retrieve information such as addresses or account data. |
| POST | To create a new resource. |
| PUT | To update the information in an existing resource. |
| DELETE | To permanently remove a resource from Addresses and Postcodes. |
All requests to endpoint V2 and V3 should be made to the following URL structure:
https://addressesandpostcodes.co.uk/api/version/resource/endpoint?key=your-api-key
Our legacy V1 API uses a slightly different API structure:
https://addressesandpostcodes.co.uk/api/pc2add/v1/resource/endpoint?key=your-api-key
The API always responds with HTTP status code of 200 code.
All responses are returned with a status parameter of 'success' or 'error'.
The basic request provides only plain address data from PAF sources. This is ideal for lightweight applications.
GET: https://addressesandpostcodes.co.uk/api/pc2add/v1/{postcode}/basic?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | The postcode you want to lookup the addresses for. |
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The full request provides our full data set at the expense of slightly increased return size and processing time.
GET: https://addressesandpostcodes.co.uk/api/pc2add/v1/{postcode}/full?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | The postcode you want to lookup the addresses for. |
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Retrieve a list of coordinates to produce a polygon around the postcode area.
GET: https://addressesandpostcodes.co.uk/api/v3/areas/{area}/path?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| area | URL Part | Yes | Any part of a postcode, but must include the area. |
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Retrieve a list of coordinates to produce a polygon around the postcode sector.
GET: https://addressesandpostcodes.co.uk/api/v3/sectors/{sector}/path?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| sector | URL Part | Yes | Any part of a postcode, but must include the sector. |
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Retrieve a count of properties within a polygon and the polygon coordinates.
GET: https://addressesandpostcodes.co.uk/api/v3/sectors/{sector}/total?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| sector | URL Part | Yes | The full postcode sector |
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Retrieve a count of postcodes within a polygon.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/total/by/path?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| path | GET | Yes | array of [lat, lng] values of the polygon. Example: [[lat, lng]. [lat, lng]. [lat, lng]] |
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Retrieve a list of postcodes within a polygon.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/list/by/path?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| path | GET | Yes | array of [lat, lng] values of the polygon. Example: [[lat, lng]. [lat, lng]. [lat, lng]] |
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Retrieve the geographical path of a postcode.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/geo/path?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | The full postcode |
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Retrieve a property by building name or number and postcode.
GET: https://addressesandpostcodes.co.uk/api/v3/paf/properties/lookup?building={building}&postcode={postcode}?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| building | GET | Yes | Name or number of the building being searched for. |
| postcode | GET | Yes | Postcode being searched Accepted inputs (not case sensitive): AB101AB, AB10 1AB, ab101ab, Ab101Ab, AB10%201AB |
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Retrieve a list of properties within a postcode.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/addresses?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode being searched Accepted inputs (not case sensitive): AB101AB, AB10 1AB, ab101ab, Ab101Ab, AB10%201AB |
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Retrieve a count of properties within a polygon.
GET: https://addressesandpostcodes.co.uk/api/v3/properties/total/by/path?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| path | GET | Yes | array of [lat, lng] values of the polygon. Example: [[lat, lng]. [lat, lng]. [lat, lng]] |
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Retrieve a count of properties within radius.
GET: https://addressesandpostcodes.co.uk/api/v3/properties/total/by/radius?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| lat | GET | Yes | latitude of the center point of your search |
| lng | GET | Yes | longitude of the center point of your search |
| radius | GET | Yes | Distance in meters from the center lat, lng |
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Retrieve a count of properties a set buffer from a line.
GET: https://addressesandpostcodes.co.uk/api/v3/properties/list/by/line?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| path | GET | Yes | array of [lat, lng] values of the polygon. Example: [[lat, lng]. [lat, lng]. [lat, lng]] |
| radius | GET | Yes | Distance in meters from the center lat, lng |
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Retrieve a count of properties within a postcode.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/total?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | The full postcode |
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Returns latitude & longitude centroid for the postcode, County and town.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/geo?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode to lookup Example: AB10 1AB or ab101ab |
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Get a list of all your saves searches - By polygon or radius.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/door-drop?key=your-api-key
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Save a Polygon or Radius search to your account.
POST: https://addressesandpostcodes.co.uk/api/v3/postcodes/door-drop?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| name | POST | Yes | Give your search results a friendly name |
| params[endpoint] | POST | Yes | Send the endpoint of the search type you are using. Valid values are: /api/v3/properties/total/by/radius /api/v3/properties/total/by/path |
| params[total] | POST | No | Number of search results found. Leave blank to calculate based on input. |
| params[path] | POST | No | Use if sending a polygon array of lat, lng values. Example [[lat, lng]. [lat, lng], [lat, lng]] |
| params[lat] | POST | No | Use if sending a radius latitude of the center point of your search |
| params[lng] | POST | No | Use if sending a radius longitude of the center point of your search |
| params[radius] | POST | No | Use if sending a radius Distance in meters from the center lat, lng |
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Remove / hide a Polygon or Radius search to your account.
DELETE: https://addressesandpostcodes.co.uk/api/v3/postcodes/door-drop?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| id | POST | Yes | ID of the search you wish to delete |
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Contains all live and terminated (closed) postcodes within the UK.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/postcode?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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The current county to which the postcode has been assigned.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/electoral-county?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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Description endpoint #3
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/local-authority-district?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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There are 33 boroughs in London (Includes the City of London which is officially a separate entity despite being located in the centre of London). We’ve reversed engineered ONS data to identify the postcodes that represent each borough.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/london-borough?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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Description endpoint #5
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/electoral-ward?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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Description endpoint #6
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/civil-parish?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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Shows the status of the assigned grid reference.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/national-grid-reference?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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The health area code for the postcode. SHAs were abolished in England in 2013 but the codes remain as a ‘frozen’ geography. The field will otherwise be blank for postcodes with no grid reference. 36 areas across the UK.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/hlthau?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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NHSERs (formerly NHS Commissioning Regions - NHS CR) are sub-divisions of the NHS commissioning board. There are four NHS ERs in England and they were renamed from NHS CRs in May 2017. The NHS CRs were formed on 1 April 2013, replacing pan SHAs, and are responsible for providing clinical and professional leadership at sub-national level. They are also responsible for the co-ordination of planning, operational management and emergency preparedness at sub-national level and undertaking direct commissioning functions and processes.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/nhser?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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The code for the appropriate country (i.e. one of the four constituent countries of the UK or Crown dependencies - the Channel Islands or the Isle of Man) to which each postcode is assigned.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/uk-country-names?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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The nine GORs were abolished on 1 April 2011 and are now known as "regions" for statistical purposes. They were the primary statistical subdivisions of England and also the areas in which the Government Offices for the Regions fulfilled their role. Each region covered a number of local authorities. The region code for each postcode. Pseudo codes are included for Wales, Scotland, Northern Ireland, Channel Island and Isle of Man. The field will be blank for postcodes in England with no grid reference
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/region?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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The 8 SSRs were the primary statistical subdivisions of England before the GORs were adopted for this purpose in 1996. They are now rarely used. The SSR code for the associated county or unitary authority to which each postcode is assigned. A pseudo code is included for postcodes not in England. The field will be blank for postcodes in England with no grid reference.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/standard-statistical-regions?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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England and Wales - Parliamentary constituencies relate to those defined by the Parliamentary Constituencies (England) Order 2007, the Parliamentary Constituencies (England) (Amendment) Order 2008 and the Parliamentary Constituencies (Wales) (Amendment) Order 2008, and which came into effect at the May 2010 General Election. No further changes are envisaged until 2020. Scotland - The Scottish Parliament (Constituencies) Act 2004, passed by the UK Parliament in July 2004, came into effect upon the dissolution of the last UK Parliament and breaks the linkage between UK parliamentary constituencies and Scottish parliamentary constituencies. This Act has enabled the Westminster Government to reduce the number of Scottish constituencies in the UK parliament in line with recommendations made by the Boundary Commission for Scotland following its Fifth Periodical Review of Constituencies (December 2004). The Parliamentary Constituencies (Scotland) Order 2005 details the reduction of the number of constituencies for the UK Parliament from 72 to 59 Scottish seats. The changes bring the size of Scottish constituencies more into line with the size of English seats. English constituencies currently contain nearly 70,000 voters on average, compared to the Scottish average of 53,500. Northern Ireland - In Northern Ireland, the Commission's Fifth Periodical Report on Parliamentary Constituencies outlined changes to and the composition of constituencies in 2010. In practice, the new Parliamentary Constituencies are not very different to their predecessors. As before there are 18 constituencies, all retaining the same name. In the main, the boundary amendment process has involved the re-assigning of existing electoral wards from one constituency into a neighbouring constituency. The only exception concerns Derryaghy ward within Lisburn City local government district which previously resided entirely within Lagan Valley County constituency. It has now been split into two separate wards - Derryaghy (North) and Derryaghy (South), the former now included in Belfast West borough constituency, the latter remaining where it was.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/westminster-parliamentary-constituency?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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EERs are as defined in the European Parliamentary Elections Bill (Bill 65, 1997) to amend the European Parliamentary Elections Act 1978 so as to alter the method used in Great Britain for electing Members of the European Parliament. The Bill created 9 EERs in England with 64 MEPs; Scotland, Wales and Northern Ireland each constitute a single EER, with 7 MEPs, 4 MEPs and 3 MEPs respectively. The EER code for each postcode. Pseudo codes are included for Channel Islands and Isle of Man. The field will otherwise be blank for postcodes with no grid reference.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/european-electoral-regions?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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The LLSC (England), DCELLS (Wales) or ER (Scotland) code for each postcode. Pseudo codes are included for Northern Ireland, Channel Islands and Isle of Man. The field will otherwise be blank for postcodes with no grid reference.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/postcode-to-local-learning-and-skills-council?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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TTWAs are used in labour market analysis and reflect reasonably self-contained zones in which the bulk of the resident population also work. The 228 current TTWAs were defined in 2015 using 2011 Census information on home and work addresses and are built from 2011 Census LSOAs in England and Wales, data zones in Scotland, and SOAs in Northern Ireland (see Section 34). The previous (2007) areas were based on the same statistical geographies from the 2001 Census. The TTWA code for the postcode. Pseudo codes are included for Channel Islands and Isle of Man. The field will otherwise be blank for postcodes with no grid reference.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/travel-to-work-areas?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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Postcodes on the ONSPD have been assigned PCO codes (England), LHB codes (Wales), CHP codes (Scotland), LCG codes (NI) or Primary Healthcare Directorate code (Isle of Man). Postcodes in the Channel Islands (for which there are no equivalent areas) have been assigned a pseudo code.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/primary-care-trusts?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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NUTS is a hierarchical classification of spatial units that provides a breakdown of the European Union’s territory for producing regional statistics that are comparable across the Union. The NUTS area classification in the UK comprises current national administrative and electoral areas, except in Scotland where some NUTS areas comprise whole and/or part Local Enterprise Regions.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/nomenclature-of-units-for-territorial-statistics?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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"Statistical" wards were those electoral wards promulgated in Statutory Instruments by the end of a calendar year and implemented for statistical purposes on 1 April in the following year, irrespective of the year of statutory operation. The policy on statistical wards was agreed by ministers and was originally intended to minimise the impact on statistics of the frequent changes to the electoral ward boundaries. However, in 2006 a change to the policy on statistical wards was agreed by the then NSGG (the National Statistics Geography Group). The 1 April implementation date is retained but it now relates to those administrative and electoral areas that are statutorily operative on 31 December of the previous calendar year (i.e. statutory wards). As such, statistical wards no longer exist – the last set produced was 2005 statistical wards. The administrative and electoral areas in England and Wales for each postcode, used for statistical analysis. A pseudo code is included for Scotland, Northern Ireland, Channel Islands and Isle of Man. The field will be blank for postcodes in England or Wales with no grid reference.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/2005-statistical-wards?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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The 2001 Census OAs were built from unit postcodes and constrained to 2003 ‘statistical’ wards, and they form the building bricks for defining higher level geographies. Pseudo codes are included for Channel Islands and Isle of Man. The field will otherwise be blank for postcodes with no grid reference. Includes OAC01, Supergroup, Group and Subgroup.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/2001-national-uk-census-output-area?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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In processing 2001 Census data for publication, 18 2003 statistical wards were identified as sub- threshold i.e. the count of population and households fell below the threshold for creating OAs and for the non-disclosive release of Census data. These 18 sub-threshold wards were combined with seven "receiving" wards to form acceptably sized OAs and permit publication of data. The sub- threshold wards are not separately identified in the ONSPD and postcodes in these statistical wards have been assigned to their receiving ward. The resulting set of wards is known as CAS wards. Sub-threshold wards (those below the threshold for creating OAs and for the non- disclosive release of Census data) are not separately identified in this field and postcodes in these "statistical wards" have been assigned to their "receiving ward". The resulting set of wards is known as "CAS Wards". A pseudo code is included for Channel Island and Isle of Man. The field will otherwise be blank for postcodes with no grid reference.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/2001-census-area-statistics?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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National parks are designed to conserve the natural beauty and cultural heritage of areas of outstanding landscape value, and to promote public understanding and enjoyment of these areas. There are currently 13 national parks in England and Wales. Of these, 10 were designated in the 1950s following the National Parks and Access to the Countryside Act 1949, The Broads (Norfolk/Suffolk) has had a similar status since 1989 (the Broads has its own special authority, the Broads Authority, which is similar to the National Park Authorities but with extra powers in relation to navigation) and The New Forest was given national park status in 2005. The South Downs is the latest national park, becoming fully operational on 1 April 2011. In Scotland the National Parks (Scotland) Act was passed in July 2000. The first Scottish national park, Loch Lomond and the Trossachs, was established in July 2002, and the Cairngorms National Park was established in March 2003. Their boundaries are not constrained by any other geography. The national parks cover parts of England, Wales and Scotland. Pseudo codes are included for Northern Ireland, Channel Islands and Isle of Man. The field will otherwise be blank for postcodes with no grid reference.
GET: https://addressesandpostcodes.co.uk/api/v3/postcodes/{postcode}/national-park?key=your-api-key
| Parameter | Type | Required | Description |
|---|---|---|---|
| postcode | URL Part | Yes | Postcode of the current to lookup Example: AB10 1AB or ab101ab |
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Our data is very up-to-date. Our address data is regularly updated from various sources, including Royal Mail's Postcode Address File database, and is enhanced with real-time corrections from address owners/occupiers submitted through our site (no other API service offers this additional feature).
Just register a free account and purchase an API credits pack, upon which we will assign you a dedicated API key in order to use our API lookup service.
A lookup is a search of a full UK postcode against our entire address database.
Lookup credits are one flat low rate of 2.5p each. It's that simple.
All credits in a pack expire one calendar year after purchase. Upon this expiry, they are considered lost and non-refundable.
If your lookup fails to get a list of addresses for any reason (e.g. an invalid UK postcode was searched), no credits will be deducted.
Not yet but we are working to hard to complete it. Over time we will complete the documentation and expose our hundreds of endpoints.
Currently there is not rate limit to paying customers. We reserve the right to change this at any time.
All our data is stored in London using an industry leading cloud provider.
The API has been designed and built over many years with best practices at the time being applied. We are working very hard to standardise the end-points. V3 of our API is our LTS release.
Please let us know if any of our API endpoints are not returning useful error messages and we will work with you to fix your API query.
Yes. While our service is designed to be self-service and fully automated, we offer support for any technical enquiry. Simply get in touch with us and we will get back to you within one business day (in most cases, within a couple of hours).
We guarantee availability of at least 99.9% from our high-performance multi-core cloud servers.