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Map boundaries are based on data from freethepostcode.org and npemap.org.uk.
| Reference | post code | location 1 | location 2 |  | LL61 27 |  | LLANFAIRPWLL POST OFFICE |  |  | LL61 30 |  | PRINGLE | LLANFAIRPWLL |  | LL61 56 |  | TANYFOEL FERRY | BRYNSIENCYN |  | LL61 65 |  | TYNYCAE | BRYNSIENCYN |  | LL61 85 |  | ABERBRAINT |  |  | LL61 95 |  | FFORDD Y LLAN |  |  | LL61 98 |  | RHOSFAWR | BRYNSIENCYN |  | LL61 105 |  | GROESLON YR OD GAERWEN |  |  | LL61 118 |  | SIGLAN |  |  | LL61 136 |  | LLANGEINWEN | DWYRAN |  | LL61 137 |  | TYNYCHWAREL |  |  | LL61 140 |  | GROESLON BRYNSIENCYN |  |  | LL61 166 |  | PENLON NEWBOROUGH |  |  | LL61 167 |  | TYDDYN PWRPAS |  |  | LL61 184 |  | PENMYNYDD POST OFFICE |  |  | LL61 195 |  | UPPER VILLAGE | LLANFAIR P.G. |  | LL61 212 |  | DWYRAN POST OFFICE |  |  | LL61 213 |  | BRYNSIENCYN POST OFFICE |  |  | LL61 214 |  | LLANEDWEN |  |  | LL61 233 |  | TY COCH | DWYRAN |  | LL61 242 |  | HEN DURNPIKE |  |  | LL61 264 |  | NEWBOROUGH POST OFFICE |  |  | LL61 268 |  | MOELYDON | BRYNSIENCYN |  | LL61 292 |  | BRAINT CROSS ROADS |  |  | LL61 293 |  | TY COCH | BRYNSIENCYN |  | LL61 320 |  | TREM ERYRI | LLANFAIR P.G. |  | LL61 336 |  | ANGLESEY SEA ZOO | BRYNSIENCYN |  
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