Keskimääräinen GPS-koordinaatit postinumero bt48: 55.027, -7.281

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Listatut kaupungit:
>> Londonderry BT48, County Londonderry, Northern Ireland, GPS-koordinaatit: 54.9981,-7.3093
>> The Collon BT48, County Londonderry, Northern Ireland, GPS-koordinaatit: 55.0271,-7.2809
>> Ballynagard BT48, County Londonderry, Northern Ireland, GPS-koordinaatit: 55.0333,-7.2667
>> Culmore BT48, County Londonderry, Northern Ireland, GPS-koordinaatit: 55.05,-7.2667
>> Coshquin BT48, County Londonderry, Northern Ireland, GPS-koordinaatit: 55.0271,-7.2809
>> Rosemount BT48, County Londonderry, Northern Ireland, GPS-koordinaatit: 55.0271,-7.2809
>> Cityside BT48, County Londonderry, Northern Ireland, GPS-koordinaatit: 55.0271,-7.2809