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AddressBase support

Ordnance Survey's addressing product, AddressBase® matches 28 million Royal Mail postal address to unique property reference numbers (UPRN), bringing a geographical dimension to the matched records.

Getting started

The AddressBase product family is made up of three products:

  • AddressBase
  • AddressBase Plus
  • AddressBase Premium

Getting started guide (PDF)

Use our getting started guide and product guide to understand the full capabilities of our AddressBase product.

Product guide (PDF)

This product guide is an introduction to the AddressBase suite of products and provides information on all three products, their main features and creation process.

AddressBase FAQs

Technical information

This is the technical specification applicable to AddressBase. 

AddressBase technical specification (PDF)

Use this technical specification document to understand the technical aspects of AddressBase.

Unique Property Reference Number (UPRN)

We allow the royalty-free use and sub-licensing of UPRNs under certain circumstances.


Key FeaturesWhat this product offers
FormatComma separated value (CSV) and GML 3.2.1
Data structurePoints
AttributesRoyal Mail postal addresses, where matched to a UPRN; coordinates for each address.
Scale1:1250 to 1:10 000
Update frequencyEvery six weeks
SupplyDVD and FTP (for orders under 2Gb). PSMA and OSMA members can download 5km chunks.
CoverageGreat Britain – pre-defined areas are available, or you can define your own area of interest