Map
General Information
| Postal Area | County Durham |
| Postcode | DL1 1YT |
| User Type | Large (more than 25 items of mail per day) |
| Region | North East |
| Country | England |
| Local authority | Darlington |
| Introduction Date | 1980-01-01 |
| Termination Date | 2004-04-01 |
Geographic Information
| Latitude | 54.5282340 |
| Longitude | -1.5137690 |
| Easting | 431566 |
| Northing | 514881 |
| Quality | Within the building of the matched address closest to the postcode mean |