OS AddressBase Solution Provider All the power of Ordnance Survey AddressBase in one API

Use our API to cherry-pick the OS AddressBase fields you want to return, and access the whole suite of Postcoder features.

39 million addresses
Including PAF and Local Authority BS7666 addresses
Complete property lifecycle
Alternative, pre-build and historic addresses
Residential and commercial properties
Plus objects without addresses like phone boxes, ponds and pylons
Geocodes
Address coordinates and grid references
Key identifiers
Records include UPRN, UDPRN and a number of other key identifiers
Read more about AddressBase Premium

Combine AddressBase with additional data
Append additional PAF datasets or ONS geospatial data.
UPRN linking
Connect existing data within your organisation to AddressBase using the unique property reference number (UPRN).
Complete form validation
It's easy to add mobile validation, email validation, bank validation and rooftop geocoding to your forms with the Postcoder API.

Fraud detection
The record of alternative addresses provided by AddressBase Premium can help financial institutions and insurance companies prevent fraud.
Risk assessment
The scale and granularity of AddressBase Premium allows you to conduct detailed risk analysis at the level of individual properties, or big picture analysis of changing neighbourhoods.
Planning and services
The provisional addresses included in AddressBase Premium enable accurate infrastructure planning that caters for growing towns and cities.