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+44-121-(4900000...4909999): Birmingham, Birmingham (BIR) Read more about +44-121-(4900000...4909999)
+44-131-(2930000...2939999): Edinburgh, City of Edinburgh (EDH) Read more about +44-131-(2930000...2939999)
+44-161-(4730000...4739999): Manchester, Manchester (MAN) Read more about +44-161-(4730000...4739999)
+44-20-(38060000...38069999): London, City of London (LND) Read more about +44-20-(38060000...38069999)