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+44-117-(2010000...2019999): Bristol, City of Bristol (BST) Read more about +44-117-(2010000...2019999)
+44-121-(3170000...3179999): Birmingham, Birmingham (BIR) Read more about +44-121-(3170000...3179999)
+44-131-(2320000...2329999): Edinburgh, City of Edinburgh (EDH) Read more about +44-131-(2320000...2329999)
+44-161-(3780000...3789999): Manchester, Manchester (MAN) Read more about +44-161-(3780000...3789999)