Licences

Postcodes.io source code is available under the MIT Licence.

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 licence from NI Land & Property Services.

Contains Ordnance Survey data © Crown copyright and database right 2025.

Contains Royal Mail data © Royal Mail copyright and database right 2025.

Contains National Statistics data © Crown copyright and database right 2025.

Contains NRS data © Crown copyright and database right 2025.