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PAF Solution Provider Simple and accurate address capture powered by PAF

Get the most up-to-date PAF data with Postcoder, the API for address lookup. Includes Multiple Residence data as standard.

Streamline your address verification process

Postcoder is an address lookup API that allows you to verify and standardise UK addresses - quickly and accurately.

Developed by Allies, a licensed PAF solution provider, Postcoder offers the most accurate data, updated daily.

Eliminate the time you spend manually correcting and verifying addresses, and let your customers fill in their address up to 80% faster.

PAF address lookup provides addresses that are 100% up-to-date and postally correct.

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All UK address data, always up-to-date

  • 30M
    30 million addresses

    Nearly 30 million residential and commercial addresses in the UK - Postcoder includes Multiple Residence data as standard.

  • 1.8 million postcodes

    Complete UK postcode data including BFPO addresses of armed forces personnel living overseas, and houses that are Not Yet Built.

  • Daily updates

    Up to 5000 records updated every day - the most accurate address data in the UK.

  • 1.4 million organisation names

    Accurate business address details for organisations across England, Wales, Scotland and Northern Ireland.

Postcoder unlocks the value of your customer database

  • Combine PAF with additional data

    It's simple to append PAF data with additional Royal Mail datasets such as Not Yet Built and BFPO.

  • Multiple Residence included

    Unlike other APIs, Postcoder includes Multiple Residence data as standard. Get accurate addresses without extra costs.

  • International datasets

    Postcoder also offers international address lookup and Eircode lookup for addresses in Ireland.

  • Complete form validation

    It's easy to add mobile validation, email validation, bank validation and rooftop geocoding to your forms with Postcoder.

  • Address validation

    Reduce the risk of undeliverable mail with address data that's instantly validated and standardised.

  • Customer experience

    Using address lookup or autocomplete makes online checkout experiences frictionless for customers.

  • Marketing and communications

    Use PAF data to market to businesses and organisations. Frequent data updates mean you waste less money on undeliverable mail.

What our customers say

Loveholidays - A customer who uses Postcoder

"It took us under a day to swap out our old system with Postcoder and we have been enjoying it ever since."

Kwifit - A customer who uses Postcoder
Sky - A customer who uses Postcoder
Sphonic - A customer who uses Postcoder

"We've been really pleased with the uptime and reliability of the service."

Kentucky Fried Chicken - A customer who uses Postcoder
Postcoder Pricing

Transparent pricing

With great prices, flexible options and a free trial that doesn't ask for your credit card, Postcoder is the ideal API for your business.

Pay just 2p per UK address lookup with our largest monthly plan or start small with a £25 pay-as-you-go credit pack.

An optimised developer experience

Integrate address lookup in minutes with Postcoder's REST API, sample code and developer-friendly documentation.

  • Javascript
  • python
  • PHP
  • C Sharp
	"addressline1": "Allies Computing Ltd",
	"addressline2": "92 St. Faiths Lane",
	"summaryline": "Allies Computing Ltd, 92 St. Faiths Lane, Norwich, Norfolk, NR1 1NE",
	"organisation": "Allies Computing Ltd",
	"number": "92",
	"premise": "92",
	"street": "St. Faiths Lane",
	"posttown": "Norwich",
	"county": "Norfolk",
	"postcode": "NR1 1NE",
	"latitude": "52.6299163702",
	"longitude": "1.3018030246",
	"grideasting": "623545",
	"gridnorthing": "308689",
	"uniquedeliverypointreferencenumber": "56137114"
An image of our support team

Having Postcoder on our checkout page has really helped ... Customers spend much less time adding their details which in turn made for a much more pleasant transaction.

Alex Woods Digital Marketing Executive at Victorian Plumbing

Free support

Postcoder is supported by our own team of experts that specialise in email validation, data quality, usability, privacy and technical integration. When you choose Postcoder, our team is your team and we're here for you if you need us, at no extra cost.

Tracking usage

Understanding how your account is being used is important, so we make it easy for you. You can view usage reports, configure email alerts and check your remaining credit balance.

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