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+44-121-(4970000...4979999): Birmingham, Birmingham (BIR) Read more about +44-121-(4970000...4979999)
+44-161-(6900000...6909999): Manchester, Manchester (MAN) Read more about +44-161-(6900000...6909999)
+44-20-(80850000...80859999): London, City of London (LND) Read more about +44-20-(80850000...80859999)