Address lookup API
Provides the fastest and most reliable way to capture accurate addresses. Ensure data quality and create the best user experience with PostCoder.
Improve database quality
Populate your database with the best quality data by capturing addresses at the point of entry.
Improve user experience
Create the best possible experience by providing a quick and easy way to fill-in addresses.
Improve business efficiency
Improve form conversions and reduce delivery issues with address validation and accurate data.
Try address lookup
See how it works with UK postcodes
Try address autocomplete
Just start typing for instant results
Trusted by 9,000 businesses
The most up-to-date address database
PostCoder is refreshed daily using the most up-to-date and comprehensive data straight from official sources including Royal Mail and Ordnance Survey.
30M+ addresses 1.8M postcodes 1.4M business names 4,500 updates every day
Use PostCoder across your business
Checkout and registration forms
Use address lookup to help customers fill in their details more easily. Capture higher quality addresses from the start.
CRMs and office apps
Help your staff spend less time typing in addresses and more time concentrating on your customers and their needs.
Speed-up customer refunds and improve address accuracy by including postcode lookup in your returns procedure.
Improve usability on devices with smaller interfaces by using postcode lookup whenever you ask for an address.
A simple API for developers
Sign up for an API key and get free lookups to try
Improve your forms in other ways
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