OS Match and Cleanse API derives data from our AddressBase Premium dataset – Great Britain’s most detailed view of addresses and their life cycles, including everything from planning to creation to change of use and demolition.


AddressBase itself contains local authority, Ordnance Survey and Royal Mail addresses, current and alternative addresses, provisional addresses (still in the planning stage) and historic information too, where it’s available. It also includes Objects Without Postal Addresses (OWPAs) and cross references to the OS MasterMap TOIDs, as well as:


  • Up to date cross references to our large-scale data, such as OS MasterMap Topography Layer and Integrated Transport Network Layer via the TOID – but also references to objects that don’t have postal addresses, as well as coordinates that have been verified via our surveyors.


  • Data from the Local Land and Property Gazetteer and One Scotland Gazetteer, which includes information captured under statutory obligation through the SNN process.


  • The Royal Mail’s data, providing a Postcode Address File (PAF) containing the UDPRN and the delivery point address record.


  • The Valuation Office Agency, which provides cross references to council tax and non-domestic rates data.