+44-121-(4250000...4259999): Birmingham, Birmingham (BIR) Read more about +44-121-(4250000...4259999)
+44-1223-(780000...780999): Cambridge, Cambridgeshire (CAM) Read more about +44-1223-(780000...780999)
+44-1225-(210000...219999): Bath, Bath and North East Somerset (BAS) Read more about +44-1225-(210000...219999)