The following localities are included in the postal area: Aberdovey, Abergele, Amlwch, Arthog, Bala, Bangor, Barmouth, Beaumaris, Benllech, Betws-Y-Coed, Blaenau Ffestiniog, Bodorgan, Brynteg, Caernarfon, Cemaes Bay, Colwyn Bay, Conwy, Corwen, Criccieth, Denbigh, Dolgellau, Dolwyddelan, Dulas, Dyffryn Ardudwy, Fairbourne, Gaerwen, Garndolbenmaen, Harlech, Holyhead, Llanbedr, Llanbedrgoch, Llandudno, Llandudno Junction, Llanerchymedd, Llanfairfechan, Llanfairpwllgwyngyll, Llangefni, Llangollen, Llanrwst, Llwyngwril, Marianglas, Menai Bridge, Moelfre, Penmaenmawr, Penrhyndeudraeth, Pentraeth, Penysarn, Porthmadog, Prestatyn, Pwllheli, Rhosgoch, Rhosneigr, Rhyl, Ruthin, St Asaph, Talsarnau, Talybont, Trefriw, Ty Croes, Tyn-y-Gongl, Tywyn, Wrexham and Y Felinheli in Wales.
| Postal district | Post town | Coverage | Local authority |
|---|---|---|---|
| LL11 | WREXHAM | ||
| LL12 | WREXHAM | ||
| LL13 | WREXHAM | ||
| LL14 | WREXHAM | ||
| LL15 | RUTHIN | ||
| LL16 | DENBIGH | ||
| LL17 | ST. ASAPH | ||
| LL18 | RHYL | ||
| LL19 | PRESTATYN | ||
| LL20 | LLANGOLLEN | ||
| LL21 | CORWEN | ||
| LL22 | ABERGELE | ||
| LL23 | BALA | ||
| LL24 | BETWS-Y-COED | ||
| LL25 | DOLWYDDELAN | ||
| LL26 | LLANRWST | ||
| LL27 | TREFRIW | ||
| LL28 | COLWYN BAY | ||
| LL29 | COLWYN BAY | ||
| LL30 | LLANDUDNO | ||
| LL31 | CONWY, LLANDUDNO JUNCTION | ||
| LL32 | CONWY | ||
| LL33 | LLANFAIRFECHAN | ||
| LL34 | PENMAENMAWR | ||
| LL35 | ABERDOVEY | ||
| LL36 | TYWYN | ||
| LL37 | LLWYNGWRIL | ||
| LL38 | FAIRBOURNE | ||
| LL39 | ARTHOG | ||
| LL40 | DOLGELLAU | ||
| LL41 | BLAENAU FFESTINIOG | ||
| LL42 | BARMOUTH | ||
| LL43 | TALYBONT | ||
| LL44 | DYFFRYN ARDUDWY | ||
| LL45 | LLANBEDR | ||
| LL46 | HARLECH | ||
| LL47 | TALSARNAU | ||
| LL48 | PENRHYNDEUDRAETH | ||
| LL49 | PORTHMADOG | ||
| LL51 | GARNDOLBENMAEN | ||
| LL52 | CRICCIETH | ||
| LL53 | PWLLHELI | ||
| LL54 | CAERNARFON | ||
| LL55 | CAERNARFON | ||
| LL56 | Y FELINHELI | ||
| LL57 | BANGOR | ||
| LL58 | BEAUMARIS | ||
| LL59 | MENAI BRIDGE | ||
| LL60 | GAERWEN | ||
| LL61 | LLANFAIRPWLLGWYNGYLL | ||
| LL62 | BODORGAN | ||
| LL63 | TY CROES | ||
| LL64 | RHOSNEIGR | ||
| LL65 | HOLYHEAD | ||
| LL66 | RHOSGOCH | ||
| LL67 | CEMAES BAY | ||
| LL68 | AMLWCH | ||
| LL69 | PENYSARN | ||
| LL70 | DULAS | ||
| LL71 | LLANERCHYMEDD | ||
| LL72 | MOELFRE | ||
| LL73 | MARIANGLAS | ||
| LL74 | TYN-Y-GONGL | ||
| LL75 | PENTRAETH | ||
| LL76 | LLANBEDRGOCH | ||
| LL77 | LLANGEFNI | ||
| LL78 | BRYNTEG |