Map
General Information
| Postal Area | County Durham |
| Postcode | DL1 1UU |
| User Type | Large (more than 25 items of mail per day) |
| Region | North East |
| Country | England |
| Local authority | Darlington |
| Introduction Date | 2002-09-01 |
| Termination Date | 2004-05-01 |
Geographic Information
| Latitude | 54.5276160 |
| Longitude | -1.5540430 |
| Easting | 428960 |
| Northing | 514795 |
| Quality | Imputed by ONS, by reference to surrounding postcode grid references |