Map
General Information
| Postal Area | Gwynedd |
| Postcode | LL77 7UN |
| User Type | Large (more than 25 items of mail per day) |
| Region | — |
| Country | Wales |
| Local authority | Isle of Anglesey |
| Introduction Date | 1980-01-01 |
Geographic Information
| Latitude | 53.2904520 |
| Longitude | -4.3203540 |
| Easting | 245432 |
| Northing | 379566 |
| Quality | Within the building of the matched address closest to the postcode mean |