Our entry-level addressing product, AddressBase® matches the 28 million Royal Mail postal address file records to local authority unique property reference numbers (UPRN), bringing a geographical dimension to the matched records.


Identify a property and locate it on a map with precision – using the X and Y coordinates we’ve assigned to the Royal Mail PAF® data.

Our basic classifications – residential or commercial – will reduce the costs and increase the effectiveness of your direct marketing.

In customer services, the need for accuracy is paramount. Have confidence in your front-line staff’s ability to look up addresses on a database of millions, quickly and easily.

Feature 1

Understanding the nation

Every address record provides Royal Mail address information from PAF, the Unique Delivery Point Reference Number (UDPRN) and X and Y coordinates.

Feature 1

Tracking customer data

Using the basic classifications in AddressBase you can quickly filter between residential and commercial addresses, which is ideal for marketing purposes.


Key featuresWhat this product offers

Comma separated value (CSV) and GML 3.2.1

Data structure



Royal Mail postal addresses, where matched to a UPRN; coordinates for each address.


1:1250 to 1:10 000

Update frequency

Every six weeks (view release schedule)


DVD and FTP (for orders under 2Gb). PSMA and OSMA members can download 5km chunks.


Great Britain – pre-defined areas are available, or you can define your own area of interest

 AddressBaseAddressBase PlusAddressBase Premium
UPRN – basic analysis
PAF Address – Royal Mail addresses
PAF UDPRN – Royal Mail's delivery reference system
Simple classification
Advanced classification
Local authority current address
Cross-reference with third-party datasets
Alternative addresses
Lifecycle data
AddressBase support ›


How is this data supplied and what do I need to use it?

AddressBase is supplied on DVD. If the file size of your order is smaller than 2Gb, you can get it from our FTP server. In addition, public sector customers can download 5km chunk orders via our download service.

You'll need geographic information system (GIS) software to use AddressBase.

Does AddressBase tell me about houses that have been converted into flats?

No. For detail like this, you'll need AddressBase Plus. It includes current properties and addresses sourced from local authorities, Ordnance Survey and Royal Mail. These are all matched to the UPRN and structured in a flat-file model.

AddressBase Plus has more records than AddressBase as it includes objects without postal addresses such as places of worship and community centres – as well as sub-divided properties. It lets you locate an address or property on a map, through the assigned x and y coordinates.

Crucially, the cross-referencing information with OS MasterMap products via Topographic Identifiers (TOIDs) means you can view address data within a wider geographic context.

I'm a commercial customer. Do I have to pay Royal Mail royalties separately?

Royal Mail royalties are included in the licence fee. A separate Royal Mail royalty fee applies if you license the AddressBase data on External Transaction Solution (ETS) terms.

See all FAQs for AddressBase ›


AddressBase is available under the following Licences:

Explore our data

You’re welcome to try out this data for free under our Data Exploration Licence.

Internal business use

When using OS data in your own business, you need our Framework Contract (Direct Customers) together with a data contract.

Creating products or services

To use this data commercially in your own products and services, or to distribute it, you will need to sign up to our Framework Contract (Partners) and a relevant defined use contract. This will vary depending on what you’re going to do with the data.

Collective mapping agreements

These products are available to members of public sector organisations under the following agreements:

Find out more in our Public sector licensing guide ›

This product is available under the:

  • Media Licence. We encourage the use of OS maps in the media – TV, films, print and online. Sign up free to give your consumers valuable context via an authoritative map.
  • Publishing licence. This is suitable for one-off publishing of maps in publications, on merchandising and websites.
View all licences ›

Case studies

Give it a try

Download a small area of AddressBase sample data

Or you can apply for a Data Exploration Licence to try out the real thing.

If you're in the public sector, this product is free of charge thanks to your mapping agreement.