UDPRN
UDPRNs are an eight digit unique numeric code (e.g. 25962203
) for any premise on the Postcode Address File. It's essentially a unique identifier for every address in the UK that Royal Mail has in its database.
Lookup a UDPRN
GET /udprn/:udprn
Returns an address identified via its Unique Delivery Point Reference Number (UDPRN).
You may find it useful to store UDPRN information as it can be used to retrieve the most recent information for an address. It can also be used to test for a "decommissioned" address.
Query Parameters
Property | Description |
---|---|
api_key |
Required unless authenticating with Authorization HTTP Header |
filter |
Comma separated whitelist of address elements to return. E.g. filter=line_1,line_2,line_3 returns only line_1 , line_2 and line_3 address elements in your response |
licensee |
Only required if you are using a sublicensed key. This parameter will associate the request with your licensee |
Examples
Request
https://api.ideal-postcodes.co.uk/v1/udprn/0?api_key=iddqd
# Or in your terminal
curl -k -G https://api.ideal-postcodes.co.uk/v1/udprn/0 \
-d "api_key=iddqd"
Response
{
"result":{
"postcode":"ID1 1QD",
"postcode_inward":"IQD",
"postcode_outward":"ID1",
"post_town":"LONDON",
"dependant_locality":"",
"double_dependant_locality":"",
"thoroughfare":"Barons Court Road",
"dependant_thoroughfare":"",
"building_number":"2",
"building_name":"",
"sub_building_name":"",
"po_box":"",
"department_name":"",
"organisation_name":"",
"udprn":25962203,
"umprn" : "",
"postcode_type":"S",
"su_organisation_indicator":"",
"delivery_point_suffix":"1G",
"line_1":"2 Barons Court Road",
"line_2":"",
"line_3":"",
"premise":"2",
"county": "Greater London",
"administrative_county": "",
"postal_county": "",
"traditional_county": "Greater London",
"district": "Hammersmith and Fulham",
"ward": "North End",
"country": "England",
"longitude":-0.208644362766368,
"latitude":51.4899488390558,
"eastings":524466,
"northings":178299
},
"code":2000,
"message":"Success"
}
A single address object is returned in the result
attribute.
Testing
To test your implementation of our API we have a range of test UDPRNs that yield both successful and unsuccessful responses to your request. They are the following
0
Returns a successful UDPRN lookup response2000
-1
Returns "UDPRN not found", error4044
-2
Returns "no lookups remaining", error4020
-3
Returns "daily (or individual) lookup limit breached", error4021
Test requests will undergo usual authentication and restriction rules (individual and daily lookup limits) to surface any problems you may have during implementation. However, it will not count towards a postcode lookup on your key.
Pricing
Per lookup charges apply. Empty responses are not charged.
Data Source
Royal Mail (Postcode Address File), Ordnance Survey (Code-Point Open)