Address Lookup API /PAF

Postcode Address File

The Postcode Address File (PAF) is Royal Mail's definitive UK address database. Updated daily, PAF is the most accurate and up-to-date record of every postal address in the UK.

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Key features of PAF

30 million addresses
Nearly 30 million residential and commercial addresses in the UK
1.8 million postcodes
Complete UK postcode data
Daily updates
Up to 5000 records updated every day
1.4 million organisation names
Accurate business address details

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Royal Mail's PAF - the definitive UK address database

Daily updates for accurate data

PAF is updated every day with additions, deletions and changes made by Royal Mail's postmen and women, or by consumers notifying Royal Mail directly. These changes total up to 5,000 a day, including newly built houses being occupied, demolished buildings being removed, and organisation names changing when businesses move premises.

Purchased and downloaded address data files can degrade fast, so accessing PAF data through an API ensures the most accurate address every time.

Daily updates for accurate data with Royal Mail's PAF Dataset

Combine PAF with additional data

Royal Mail produce additional datasets to enrich PAF data with further address detail. Multiple Residence provides data of multiple households residing behind a single delivery point. Not Yet Built adds data of houses that are planned or yet to be built.

UK-wide addresses

PAF data covers all residential and business addresses in England, Wales, Scotland and Northern Ireland, including BFPO addresses of armed forces personnel living overseas.

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How PAF can help your organisation

Address validation
Accurate address data is vital for verifying postal addresses, identity checks and fraud prevention. PAF is updated daily so you can be sure you're receiving the most accurate address data in the UK.
Customer experience
Address lookup or autocomplete using PAF data provides a fast and frictionless online checkout experience for your customers.
Efficient deliveries
Make sure parcels reach their destinations first time with address validation, and plan efficient delivery routes to save costs.
Marketing and communications
Market to businesses and organisations directly using PAF data, regular updates reduce the mis-delivery costs of direct mail communications.