| Reference |
post code |
location 1 |
location 2 |
| LL57 1 | | RAILWAY STATION | |
| LL57 2 | | PENDREF | HIGH STREET |
| LL57 3 | | LOVE LANE | |
| LL57 4 | | HIRAEL POST OFFICE | ORME ROAD |
| LL57 5 | | GLANADDA POST OFFICE | CAERNARFON |
| LL57 6 | | WEST END | |
| LL57 7 | | YSBYTY GWYNEDD | NORTH WEST WALES NHS TRUST |
| LL57 9 | | GEORGES CROSSING MENAI BRIDGE | |
| LL57 10 | | CAERNARFON ROAD | Y FELINHELI, CAERNARFON |
| LL57 11 | | BANGOR MAIN POST OFFICE | |
| LL57 12 | | BANGOR DELIVERY OFFICE | |
| LL57 19 | | COED Y PARC | |
| LL57 21 | | BRAICHMELYN | |
| LL57 28 | | TAI COED | |
| LL57 41 | | TANRHIW ROAD | |
| LL57 52 | | GIANAETHWY | MENAI BRIDGE |
| LL57 57 | | BETHESDA RAILWAY STATION | |
| LL57 62 | | PENRHYN AVENUE | |
| LL57 66 | | TYNLON TREBORTH | GLAN MENAI |
| LL57 84 | | BRYN EGLWYS | |
| LL57 86 | | OLD GARTH POST OFFICE | |
| LL57 88 | | TREGARTH POST OFFICE | |
| LL57 89 | | TANLON | |
| LL57 90 | | HIGH STREET | ALLIANCE BUILDING |
| LL57 91 | | UPPER BANGOR POST OFFICE | |
| LL57 93 | | CRAIG Y PANDY | |
| LL57 103 | | COLLEGE ROAD | |
| LL57 107 | | LLANDEGAI INDUSTRIAL ESTATE | |
| LL57 108 | | LLANDEGAI VILLAGE | |
| LL57 113 | | TYN Y MAES | |
| LL57 116 | | DEAN STREET | |
| LL57 117 | | ST JAMES CHURCH | FFRIDDOEDD |
| LL57 122 | | PENYGROES TREGARTH | |
| LL57 123 | | CARNEDDI POST OFFICE | |
| LL57 127 | | POR PENRHYN | |
| LL57 135 | | BRYN BELLA | |
| LL57 143 | | HIGH STREET | HALIFAX |
| LL57 146 | | PENUCHELDRE | |
| LL57 151 | | GERLAN POST OFFICE | |
| LL57 164 | | VICTORIA PARK | |
| LL57 175 | | GLASINFRYN | |
| LL57 177 | | PENTIR | |
| LL57 178 | | RHIWLAS POST OFFICE | |
| LL57 180 | | MYNYDD LLANDEGAI POST OFFICE | |
| LL57 185 | | TALYBONT BOX | |
| LL57 196 | | PENRHOSGARNEDD POST OFFICE | |
| LL57 207 | | BEACH ROAD | |
| LL57 211 | | CAPEL CRAIG | PENRHOSGAR |
| LL57 216 | | LLANLLECHID POST OFFICE | |
| LL57 222 | | SILIWEN ROAD | |
| LL57 228 | | WAEN PENTIR CAERHUN | |
| LL57 232 | | CAE FFYNON ROAD | |
| LL57 235 | | BONTUCHAF | |
| LL57 239 | | BODFEIRIG TREGARTH | |
| LL57 240 | | OLD FRIARS SCHOOL | |
| LL57 243 | | CAERHUN | |
| LL57 244 | | MINFFORDD | |
| LL57 246 | | RHYDYGROES | |
| LL57 254 | | COED MAWR | |
| LL57 257 | | MAES COETMOR | |
| LL57 269 | | PENRHOS ROAD | |
| LL57 276 | | GELLI TREGARTH | |
| LL57 279 | | BRYN LLWYD | |
| LL57 280 | | ADWYR NANT | |
| LL57 281 | | FFRIDDOEDD POST OFFICE | |
| LL57 285 | | MAESGEIRCHEN POST OFFICE | |
| LL57 297 | | FRON OGWEN TREGARTH | |
| LL57 299 | | EITHINOG | |
| LL57 302 | | YNYS IAGO PENTIR | |
| LL57 305 | | CAE FOEL MYNYDD | |
| LL57 307 | | GOETRA BACH | CAERNARFON |
| LL57 313 | | ERW FAEN TREGARTH | |
| LL57 317 | | ST MARYS | |
| LL57 324 | | TESCO | |
| LL57 325 | | SAFEWAY | |
| LL57 326 | | TANYBRYN | |
| LL57 338 | | PARC MENAI M.B | FFORDD Y LLY |
| LL57 300 | LL57 1PB | WHSMITH | BANGOR |
| LL57 319 | LL57 1UL | WOOLWORTHS | HIGH STREET |
| LL57 310 | LL57 2NH | PENRHOSGARNEDD | BANGOR |
| LL57 339 | LL57 2TZ | PARC MENAI | |
| LL57 218 | LL57 3AY | BETHESDA POST OFFICE | |
| LL57 54 | LL57 3LH | LLANLLECHYD | |
| LL57 14 | LL57 4SN | TESCO STORES | BANGOR |
Map boundaries are based on data from