Map
General Information
| Postal Area | Chelmsford |
| Postcode | CM1 1DU |
| User Type | Large (more than 25 items of mail per day) |
| Region | East of England |
| Country | England |
| Local authority | Chelmsford |
| Introduction Date | 1980-01-01 |
Geographic Information
| Latitude | 51.7332390 |
| Longitude | 0.4738040 |
| Easting | 570925 |
| Northing | 206732 |
| Quality | Within the building of the matched address closest to the postcode mean |