Map
General Information
| Postal Area | Belfast |
| Postcode | BT1 3NN |
| User Type | Small (less than 25 items of mail per day) |
| Region | — |
| Country | Northern Ireland |
| Local authority | Belfast |
| Introduction Date | 1984-12-01 |
| Termination Date | 1991-12-01 |
Geographic Information
| Latitude | 54.5952770 |
| Longitude | -5.9172250 |
| Easting | 334667 |
| Northing | 373887 |
| Quality | Postcode terminated prior to Gridlink® initiative, last known ONS postcode grid reference |