The SA4 1YB postcode was located in Carmarthenshire, Carmarthenshire postcode town, within Wales, Wales region.
It is now a terminated postcode, it was a Small User postcode introduced in 1980-01 and terminated on 2001-12.
| Name | Type |
|---|---|
| OA21CD | W00003721 |
| LSOA21CD | W01000690 |
| MSOA21CD | W02000160 |
| MSOA21 | Swiss Valley & Llangennech |
| Postcode Area | SA4 |
| Ward | Llangennech |
| LTLA22 | Carmarthenshire |
| UTLA22 | Carmarthenshire |
| Region | Wales |
| Country | Wales |
| Co-ordinates | [ -4.073723946369086, 51.711144933132076 ] |