Map
General Information
| Postal Area | County Durham |
| Postcode | DL1 1NL |
| User Type | Large (more than 25 items of mail per day) |
| Region | North East |
| Country | England |
| Local authority | Darlington |
| Introduction Date | 1980-01-01 |
Geographic Information
| Latitude | 54.5257750 |
| Longitude | -1.5543720 |
| Easting | 428940 |
| Northing | 514590 |
| Quality | Within the building of the matched address closest to the postcode mean |