LL postcode area covering the postal districts of 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.