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A dataset of unique identifiers for every addressable location in Great Britain, containing all Unique Property Reference Numbers (UPRNs) and geometry from AddressBase Premium.


Uniquely identify addressable locations

UPRNs are the authoritative identifier used to uniquely identify addressable locations in Great Britain. Essential for bringing property and address information together.

Unique Property Reference Number

A Unique Property Reference Number (UPRN) is a unique numeric identifier for every addressable location in Great Britain, found in OS's AddressBase products.

Addressable features

UPRNs are assigned to approximately 40 million addressable locations, which may be any kind of building; residential or commercial. It may also be an object that might not have a ‘postal ’ address – such as a bus shelter or electricity sub-station.

Greater freedoms

OS Open UPRN will enable you to share and link data related to UPRNs, which you can spatially analyse and visualise using the accurate location.

Trusted data

Trusted data

The UPRNs in OS Open UPRN are primarily allocated by Local Authorities, under their legal duty to maintain this information. This means you can have confidence you're accessing an authoritative source of these identifiers

Identifiers you can trust

Identifiers you can trust

The UPRN is a persistent identifier to an addressable location that is never re-used, allowing you to confidently manage associated information to an address.

Regularly updated and easy to access

Regularly updated and easy to access

OS Open UPRN is updated every six weeks aligned to AddressBase Premium. Available in CSV or GeoPackage to quickly get started with this product.

How to get this product

Technical specification

Key FeaturesWhat this product offers

Comma separated value (CSV) and GeoPackage

Data structure



UPRN, Easting, Northing, Latitude, Longitude

Update frequency

Six-weekly refresh


Online download


Great Britain