Or use https://mapit.mysociety.org/ which includes Northern Ireland postcodes. If you care about the fact that some postcodes may straddle multiple constituencies (ie ...

This solution produces three databases in the database directory. A spatialite region database. This requires spatialite extensions to be installed, or for you to use ...

Introduction: A postcode, also known as a postal or zip code, is an essential piece of information when sending mail or packages. It aids in the accurate and efficient delivery of items to specific ...