The AL7 3YN postcode was located in Welwyn Hatfield, Hertfordshire postcode town, within East of England, England region.
It is now a terminated postcode, it was a Large User postcode introduced in 2004-02 and terminated on 2005-07.
| Name | Type |
|---|---|
| OA21CD | E00121642 |
| LSOA21CD | E01023956 |
| MSOA21CD | E02004986 |
| MSOA21 | Peartree |
| Postcode Area | AL7 |
| Ward | Peartree |
| LTLA22 | Welwyn Hatfield |
| UTLA22 | Hertfordshire |
| Region | East of England |
| Country | England |
| Co-ordinates | [ -0.19948694981582554, 51.79595873843099 ] |