The AL7 3SW 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 1991-01 and terminated on 1994-05.
| Name | Type |
|---|---|
| OA21CD | E00190313 |
| LSOA21CD | E01035605 |
| MSOA21CD | E02004986 |
| MSOA21 | Peartree |
| Postcode Area | AL7 |
| Ward | Peartree |
| LTLA22 | Welwyn Hatfield |
| UTLA22 | Hertfordshire |
| Region | East of England |
| Country | England |
| Co-ordinates | [ -0.20182966572247274, 51.79648915492335 ] |