+44-121-(3680000...3689999): Birmingham, Birmingham (BIR) Read more about +44-121-(3680000...3689999)
+44-121-(4680000...4689999): Birmingham, Birmingham (BIR) Read more about +44-121-(4680000...4689999)
+44-1223-(790000...790999): Cambridge, Cambridgeshire (CAM) Read more about +44-1223-(790000...790999)
+44-1223-(976000...976999): Cambridge, Cambridgeshire (CAM) Read more about +44-1223-(976000...976999)
+44-1225-(637000...637999): Bath, Bath and North East Somerset (BAS) Read more about +44-1225-(637000...637999)