Open Source
MIT licensed. Maintained and freely available on GitHub. Fork it, make a contribution or even set up your own
Regularly Updated
Updated with the latest data from Ordnance Survey and Office for National Statistics when it becomes available
Convenient Methods
Simple, useful and self-explanatory API methods like bulk reverse geocoding, autocomplete and validation
API Endpoints
Postcode Validation
Quickly confirm if a UK postcode is valid, find nearest postcodes or lookup outward codes. Our validation API handles all UK postcode formats and provides detailed responses with comprehensive geographic data.
Bulk Reverse Geocoding
Convert large sets of lat/long coordinates into their nearest postcode areas
Geographical & Demographic Data
Retrieve region, boundary, and administrative details for any given postcode
When Your Project Demands More
Postcodes.io is our free and reliable tool for UK postcode lookup and geocoding.
When you need broader coverage, fresher and more detailed address data, and expert support, Ideal Postcodes is built for high-demand applications.
- Whole United Kingdom & territories, international datasets
- Rooftop Geocodes and UPRNs on every search
- Property level precision
- Updated daily from Royal Mail, Ordnance Survey and other UK data providers
- Dedicated Support
What you get with Ideal Postcodes