+44-1223-(918000...918999): Cambridge, Cambridgeshire (CAM) Read more about +44-1223-(918000...918999)
+44-161-(9380000...9389999): Manchester, Manchester (MAN) Read more about +44-161-(9380000...9389999)
+44-20-(35400000...35409999): London, City of London (LND) Read more about +44-20-(35400000...35409999)
+44-115-(7730000...7739999): Nottingham, Nottingham (NGM) Read more about +44-115-(7730000...7739999)
+44-116-(3130000...3139999): Leicester, Leicestershire (LEC) Read more about +44-116-(3130000...3139999)
+44-117-(2350000...2359999): Bristol, City of Bristol (BST) Read more about +44-117-(2350000...2359999)