The CM21 0LN postcode was located in East Hertfordshire, Hertfordshire postcode town, within East of England, England region.
It is now a terminated postcode, it was a Large User postcode introduced in 1994-05 and terminated on 1995-01.
| Name | Type |
|---|---|
| OA21CD | E00119343 |
| LSOA21CD | E01023496 |
| MSOA21CD | E02004886 |
| MSOA21 | Much Hadham & Hunsdon |
| Postcode Area | CM21 |
| Ward | Much Hadham |
| LTLA22 | East Hertfordshire |
| UTLA22 | Hertfordshire |
| Region | East of England |
| Country | England |
| Co-ordinates | [ 0.1315404080129464, 51.82329005400766 ] |