+44-121-(2710000...2719999): Birmingham, Birmingham (BIR) Read more about +44-121-(2710000...2719999)
+44-1223-(776000...776999): Cambridge, Cambridgeshire (CAM) Read more about +44-1223-(776000...776999)
+44-1223-(921000...921999): Cambridge, Cambridgeshire (CAM) Read more about +44-1223-(921000...921999)
+44-1225-(690000...690999): Bath, Bath and North East Somerset (BAS) Read more about +44-1225-(690000...690999)
+44-1225-(696000...696999): Bath, Bath and North East Somerset (BAS) Read more about +44-1225-(696000...696999)