This is a free API. Postcodes.io is aimed at developers who want a resource to lookup and (reverse) geocode UK Postcodes.
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For bugs and feature requests use our Github issue tracker.
This API is up-to-date with the ONS's Postcode Directory for November 2016. Beyond that date, new postcodes may be added. Existing postcodes may be amended or discontinued. This information will not be captured until the next quarterly update.
Postcodes.io is available under the MIT License
Great Britain postcode data may be used under the terms of the OS OpenData licence.
Northern Ireland postcode data (i.e. beginning "BT") may be used under the terms of the ONSPD licence. Non-commercial use is free. Commercial use requires a license from NI Land & Property Services
Contains Ordnance Survey data © Crown copyright and database right 2016
Contains Royal Mail data © Royal Mail copyright and database right 2016
Contains National Statistics data © Crown copyright and database right 2016
Postcode.io, a laudable company in California providing technology applications and services to local governments.