| Dialling Code | Exchange |
| 01994 | St Clears |
| 01982 | Builth Wells |
| 01978 | Wrexham |
| 01970 | Aberystwyth |
| 01938 | Welshpool |
| 01874 | Brecon |
| 01873 | Abergavenny |
| 01834 | Narberth |
| 01824 | Ruthin |
| 01792 | Swansea |
| 01766 | Porthmadog |
| 01758 | Pwllheli |
| 01745 | Rhyl |
| 01691 | Oswestry (England) |
| 01690 | Betws-y-Coed |
| 01686 | Llanidloes & Newtown |
| 01685 | Merthyr Tydfil |
| 01678 | Bala |
| 01656 | Bridgend |
| 01654 | Machynlleth |
| 01650 | Cemmaes Road |
| 01646 | Milford Haven |
| 01639 | Neath |
| 01633 | Newport |
| 01600 | Monmouth |
| 01597 | Llandrindod Wells |
| 01591 | Llanwrtyd Wells |
| 01570 | Lampeter |
| 01559 | Llandysul |
| 01558 | Llandeilo |
| 01554 | Llanelli |
| 01550 | Llandovery |
| 01547 | Knighton |
| 01545 | Llanarth |
| 01497 | Hay on Wye |
| 01495 | Pontypool |
| 01492 | Colwyn Bay |
| 01490 | Corwen |
| 01446 | Barry |
| 01443 | Pontypridd |
| 01437 | Clynderwen & Haverfordwest |
| 01407 | Holyhead |
| 01352 | Mold |
| 01348 | Fishguard |
| 01291 | Chepstow |
| 01286 | Caernarfon |
| 01269 | Ammanford |
| 01267 | Carmarthen |
| 01248 | Bangor |
| 01244 | Chester (England) |
| 01239 | Cardigan |
| 029 | Cardiff* |
