Postcodes in Trelystan and Trewern, Powys Unitary Authority

Aber-craf and Ystradgynlais ,   Banwy, Llanfihangel and Llanwddyn ,   Berriew and Castle Caereinion ,   Brecon East ,   Brecon West ,   Bronllys and Felin-fach ,   Builth ,   Caersws ,   Churchstoke ,   Crickhowell with Cwmdu and Tretower ,   Cwm-twrch ,   Disserth and Trecoed with Newbridge ,   Dolforwyn ,   Forden and Montgomery ,   Glantwymyn ,   Glasbury ,   Guilsfield ,   Gwernyfed ,   Hay ,   Ithon Valley ,   Kerry ,   Knighton with Beguildy ,   Llanafanfawr with Garth ,   Llanbrynmair ,   Llandinam with Dolfor ,   Llandrindod North ,   Llandrindod South ,   Llandrinio ,   Llandysilio ,   Llanelwedd ,   Llanfair Caereinion and Llanerfyl ,   Llanfyllin ,   Llangattock and Llangynidr ,   Llangors with Bwlch ,   Llangunllo with Norton ,   Llangyniew and Meifod ,   Llanidloes ,   Llanrhaeadr-ym-Mochnant and Llansilin ,   Llansantffraid ,   Llanwrtyd Wells ,   Llanyre with Nantmel ,   Machynlleth ,   Maescar and Llywel ,   Newtown Central and South ,   Newtown East ,   Newtown North ,   Newtown West ,   Old Radnor ,   Presteigne ,   Rhayader ,   Rhiwcynon ,   Talgarth ,   Talybont-on-Usk ,   Tawe Uchaf ,   Trelystan and Trewern ,   Welshpool Castle ,   Welshpool Gungrog ,   Welshpool Llanerchyddol ,   Ynyscedwyn ,   Yscir with Honddu Isaf and Llanddew