LL4 — 10 codes dans 63 localités (Royaume-Uni).
| Code postal | Localité / Quartier | Zone administrative | Coordonnées |
|---|---|---|---|
| Abergwynant | Gwynedd · Wales | 52.7991, -3.9134 | |
| Nannau | Gwynedd · Wales | 52.7991, -3.9134 | |
| Bont Newydd | Gwynedd · Wales | 52.7991, -3.9134 | |
| Wenallt | Gwynedd · Wales | 52.7991, -3.9134 | |
| Rhydymain | Gwynedd · Wales | 52.7991, -3.9134 | |
| Pont Rhyd-sarn | Gwynedd · Wales | 52.7991, -3.9134 | |
| Penmaenpool | Gwynedd · Wales | 52.7991, -3.9134 | |
| Pen-y-bryn | Gwynedd · Wales | 52.7991, -3.9134 | |
| Pant Gwyn | Gwynedd · Wales | 52.7991, -3.9134 | |
| Minffordd | Gwynedd · Wales | 52.7564, -3.8751 | |
| Llanfachreth | Gwynedd · Wales | 52.7853, -3.8513 | |
| Llanelltyd | Gwynedd · Wales | 52.7572, -3.9027 | |
| Ganllwyd | Gwynedd · Wales | 52.7991, -3.9134 | |
| Dolgellau | Gwynedd · Wales | 52.7422, -3.8861 | |
| Brithdir | Gwynedd · Wales | 52.7853, -3.8513 | |
| Bontddu | Gwynedd · Wales | 52.7991, -3.9134 | |
| Maentwrog | Gwynedd · Wales | 52.946, -3.9879 | |
| Trawsfynydd | Gwynedd · Wales | 52.9021, -3.9229 | |
| Tanygrisiau | Gwynedd · Wales | 52.987, -3.9574 | |
| Rhiwbryfdir | Gwynedd · Wales | 52.958, -3.9475 | |
| Bethania | Gwynedd · Wales | 52.958, -3.9475 | |
| Gellilydan | Gwynedd · Wales | 52.958, -3.9475 | |
| Ffestiniog | Gwynedd · Wales | 52.96, -3.9324 | |
| Cefndeuddwr | Gwynedd · Wales | 52.958, -3.9475 | |
| Bronaber | Gwynedd · Wales | 52.958, -3.9475 | |
| Blaenau Ffestiniog | Gwynedd · Wales | 52.9946, -3.937 | |
| Barmouth | Gwynedd · Wales | 52.7238, -4.0575 | |
| Caerdeon | Gwynedd · Wales | 52.7431, -4.0022 | |
| Cutiau | Gwynedd · Wales | 52.7359, -4.0445 | |
| Llanaber | Gwynedd · Wales | 52.7404, -4.0762 | |
| Tal-y-bont | Gwynedd · Wales | 52.7745, -4.0927 | |
| Llanenddwyn | Gwynedd · Wales | 52.7889, -4.103 | |
| Dyffryn Ardudwy | Gwynedd · Wales | 52.7909, -4.0972 | |
| Llanddwywe | Gwynedd · Wales | 52.7799, -4.0969 | |
| Coed Ystumgwern | Gwynedd · Wales | 52.7821, -4.0882 | |
| Llanbedr | Gwynedd · Wales | 52.8167, -4.1 | |
| Llandanwg | Gwynedd · Wales | 52.8224, -4.0961 | |
| Pen-sarn | Gwynedd · Wales | 52.8224, -4.0961 | |
| Pentre Gwynfryn | Gwynedd · Wales | 52.8224, -4.0961 | |
| Eisingrug | Gwynedd · Wales | 52.8518, -4.1119 | |
| Glyn-Cywarch | Gwynedd · Wales | 52.8518, -4.1119 | |
| Harlech | Gwynedd · Wales | 52.8594, -4.1083 | |
| Llanfair | Gwynedd · Wales | 52.8441, -4.1154 | |
| Talsarnau | Gwynedd · Wales | 52.9034, -4.0649 | |
| Ynys | Gwynedd · Wales | 52.9034, -4.0649 | |
| Penrhyndeudraeth | Gwynedd · Wales | 52.9333, -4.0667 | |
| Tan-lan | Gwynedd · Wales | 52.9315, -4.0731 | |
| Rhyd | Gwynedd · Wales | 52.9315, -4.0731 | |
| Portmeirion | Gwynedd · Wales | 52.9173, -4.0923 | |
| Llanfrothen | Gwynedd · Wales | 52.9507, -4.0512 | |
| Minffordd | Gwynedd · Wales | 52.9246, -4.0821 | |
| Garreg | Gwynedd · Wales | 52.9315, -4.0731 | |
| Croesor | Gwynedd · Wales | 52.9315, -4.0731 | |
| Cae Ddafydd | Gwynedd · Wales | 52.9315, -4.0731 | |
| Borth-y-Gest | Gwynedd · Wales | 52.9502, -4.1752 | |
| Dolbenmaen | Gwynedd · Wales | 52.9291, -4.1378 | |
| Golan | Gwynedd · Wales | 52.9502, -4.1752 | |
| Llanfihangel-y-pennant | Gwynedd · Wales | 52.9291, -4.1378 | |
| Morfa Bychan | Gwynedd · Wales | 52.9502, -4.1752 | |
| Penmorfa | Gwynedd · Wales | 52.9502, -4.1752 | |
| Porthmadog | Gwynedd · Wales | 52.9292, -4.1314 | |
| Prenteg | Gwynedd · Wales | 52.9502, -4.1752 | |
| Rhoslan | Gwynedd · Wales | 52.9502, -4.1752 | |
| Tremadog | Gwynedd · Wales | 52.9405, -4.1418 |