Map
General Information
| Postal Area | County Durham |
| Postcode | DL1 1AD |
| User Type | Large (more than 25 items of mail per day) |
| Region | North East |
| Country | England |
| Local authority | Darlington |
| Introduction Date | 1982-03-01 |
| Termination Date | 1990-12-01 |
Geographic Information
| Latitude | 54.5231600 |
| Longitude | -1.5519290 |
| Easting | 429100 |
| Northing | 514300 |
| Quality | Postcode terminated prior to Gridlink® initiative, last known ONS postcode grid reference |