Map
General Information
| Postal Area | Chelmsford |
| Postcode | CM1 1SL |
| User Type | Small (less than 25 items of mail per day) |
| Region | East of England |
| Country | England |
| Local authority | Chelmsford |
| Introduction Date | 1984-02-01 |
Geographic Information
| Latitude | 51.7374620 |
| Longitude | 0.4774240 |
| Easting | 571159 |
| Northing | 207210 |
| Quality | Within the building of the matched address closest to the postcode mean |