Notering byer (14 sted (er)). Velg byen for å se postnummeret (s):
| Caersws (1) Carno (1) Castle Caereinion (1) Cefn-gwyn (1) Cemmaes (1) Clatter (1) Commins Coch (1) | Corris (1) Corris Uchaf (1) Crosslanes (1) Cwm-Cewydd (1) Cwm-Llinau (1) Cwmbelan (1) Cwrt (1) |
