Map
General Information
| Postal Area | Monmouthshire |
| Postcode | NP1 4SL |
| User Type | Small (less than 25 items of mail per day) |
| Region | — |
| Country | Wales |
| Local authority | Caerphilly |
| Introduction Date | 1980-01-01 |
| Termination Date | 1999-06-01 |
Geographic Information
| Latitude | 51.6491640 |
| Longitude | -3.1388960 |
| Easting | 321300 |
| Northing | 195100 |
| Quality | Postcode terminated prior to Gridlink® initiative, last known ONS postcode grid reference |