+44-115-(8050000...8059999): Nottingham, Nottingham (NGM) Read more about +44-115-(8050000...8059999)
+44-116-(3010000...3019999): Leicester, Leicestershire (LEC) Read more about +44-116-(3010000...3019999)
+44-121-(3040000...3049999): Birmingham, Birmingham (BIR) Read more about +44-121-(3040000...3049999)
+44-1438-(390000...399999): Stevenage, Hertfordshire (HRT) Read more about +44-1438-(390000...399999)
+44-161-(6320000...6329999): Manchester, Manchester (MAN) Read more about +44-161-(6320000...6329999)
+44-20-(30640000...30649999): London, City of London (LND) Read more about +44-20-(30640000...30649999)