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 ...

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 ...

See how Ideal Postcodes’ Postcode Lookup makes UK & Ireland address entry effortless. Enter a postcode and instantly return a verified address. We also include rooftop-accurate geolocations and UPRNs ...