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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

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.

Combine PAF with additional data with Royal Mail's PAF Dataset

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.
Royal Mail PAF Address ValidationRoyal Mail PAF customer experienceRoyal Mail PAF efficient deliveriesRoyal Mail PAF marketing and communications

Use Postcoder to access PAF with our simple and secure API

Postcoder is hosted on a leading cloud platform in the UK and Ireland, and is supported by our friendly team of addressing specialists.

  • Secure HTTPS connection
  • GDPR compliant data processing
  • 99.99% API uptime
  • 350ms real-world response time
  • Free technical support and licensing guidance
  • Find out more about the power of Postcoder

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