CF4 — 9 codes dans 55 localités (Royaume-Uni).
| Code postal | Localité / Quartier | Zone administrative | Coordonnées |
|---|---|---|---|
| Clydach Vale | Rhondda Cynon Taff · Wales | 51.6267, -3.4802 | |
| Penygraig | Rhondda Cynon Taff · Wales | 51.6273, -3.4619 | |
| Tonypandy | Rhondda Cynon Taff · Wales | 51.622, -3.4554 | |
| Trealaw | Rhondda Cynon Taff · Wales | 51.6273, -3.4619 | |
| Ystrad | Rhondda Cynon Taff · Wales | 51.6273, -3.4619 | |
| Llwynypia | Rhondda Cynon Taff · Wales | 51.6333, -3.45 | |
| Pentre | Rhondda Cynon Taff · Wales | 51.6543, -3.4913 | |
| Ton-Pentre | Rhondda Cynon Taff · Wales | 51.6543, -3.4913 | |
| Rhondda | Rhondda Cynon Taff · Wales | 51.6673, -3.5238 | |
| Treherbert | Rhondda Cynon Taff · Wales | 51.6714, -3.5297 | |
| Tynewydd | Rhondda Cynon Taff · Wales | 51.6673, -3.5238 | |
| Cwm-parc | Rhondda Cynon Taff · Wales | 51.6673, -3.5238 | |
| Blaenrhondda | Rhondda Cynon Taff · Wales | 51.6673, -3.5238 | |
| Blaencwm | Rhondda Cynon Taff · Wales | 51.6673, -3.5238 | |
| Ferndale | Rhondda Cynon Taff · Wales | 51.6606, -3.4475 | |
| Maerdy | Rhondda Cynon Taff · Wales | 51.6753, -3.4867 | |
| Penrhys | Rhondda Cynon Taff · Wales | 51.6679, -3.4671 | |
| Pont y gwaith | Rhondda Cynon Taff · Wales | 51.6679, -3.4671 | |
| Tylorstown | Rhondda Cynon Taff · Wales | 51.6679, -3.4671 | |
| Ystradfellte | Powys · Wales | 51.809, -3.553 | |
| Trecynon | Rhondda Cynon Taff · Wales | 51.7327, -3.4829 | |
| Rhigos | Rhondda Cynon Taff · Wales | 51.7423, -3.5619 | |
| Pontbren llwyd | Rhondda Cynon Taff · Wales | 51.7327, -3.4829 | |
| Penywaun | Rhondda Cynon Taff · Wales | 51.7317, -3.4825 | |
| Penderyn | Rhondda Cynon Taff · Wales | 51.7599, -3.5222 | |
| Llwydcoed | Rhondda Cynon Taff · Wales | 51.7314, -3.4601 | |
| Hirwaun | Rhondda Cynon Taff · Wales | 51.7392, -3.5103 | |
| Cwmdare | Rhondda Cynon Taff · Wales | 51.7206, -3.4728 | |
| Cwmaman | Rhondda Cynon Taff · Wales | 51.6889, -3.4398 | |
| Cwm-bach | Rhondda Cynon Taff · Wales | 51.7327, -3.4829 | |
| Aberdare | Rhondda Cynon Taff · Wales | 51.7144, -3.4492 | |
| Abercwmboi | Rhondda Cynon Taff · Wales | 51.7327, -3.4829 | |
| Aberaman | Rhondda Cynon Taff · Wales | 51.7031, -3.4303 | |
| Aber-nant | Rhondda Cynon Taff · Wales | 51.7194, -3.4303 | |
| Aber-llia | Powys · Wales | 51.7327, -3.4829 | |
| Abercynon | Rhondda Cynon Taff · Wales | 51.6455, -3.3273 | |
| Miskin | Rhondda Cynon Taff · Wales | 51.6645, -3.3537 | |
| Mountain Ash | Rhondda Cynon Taff · Wales | 51.6836, -3.3801 | |
| Penrhiwceiber | Rhondda Cynon Taff · Wales | 51.6645, -3.3537 | |
| Ynysboeth | Rhondda Cynon Taff · Wales | 51.6645, -3.3537 | |
| Trelewis | Merthyr Tydfil · Wales | 51.6741, -3.3016 | |
| Nelson | Caerphilly · Wales | 51.6533, -3.2844 | |
| Treharris | Merthyr Tydfil · Wales | 51.6646, -3.3073 | |
| Bedlinog | Merthyr Tydfil · Wales | 51.7043, -3.3131 | |
| Merthyr Tydfil | Merthyr Tydfil · Wales | 51.7479, -3.3778 | |
| Abercanaid | Merthyr Tydfil · Wales | 51.7236, -3.3661 | |
| Aberfan | Merthyr Tydfil · Wales | 51.6872, -3.3319 | |
| Cefn-coed-y-cymmer | Merthyr Tydfil · Wales | 51.764, -3.4076 | |
| Merthyr Vale | Merthyr Tydfil · Wales | 51.7303, -3.372 | |
| Nant-ddu | Powys · Wales | 51.7303, -3.372 | |
| Ochr-y-Mynydd | Merthyr Tydfil · Wales | 51.7303, -3.372 | |
| Pentrebach | Merthyr Tydfil · Wales | 51.7303, -3.372 | |
| Pontsticill | Merthyr Tydfil · Wales | 51.7303, -3.372 | |
| Troedyrhiw | Merthyr Tydfil · Wales | 51.7125, -3.3466 | |
| Vaynor | Merthyr Tydfil · Wales | 51.764, -3.4076 |