+44-121-(0110000...0119999): Birmingham, Birmingham (BIR) Read more about +44-121-(0110000...0119999)
+44-161-(0100000...0109999): Manchester, Manchester (MAN) Read more about +44-161-(0100000...0109999)
+44-20-(19990000...19999999): London, City of London (LND) Read more about +44-20-(19990000...19999999)
