+44-121-(2020000...2029999): Birmingham, Birmingham (BIR) Read more about +44-121-(2020000...2029999)
+44-121-(2040000...2049999): Birmingham, Birmingham (BIR) Read more about +44-121-(2040000...2049999)
+44-121-(2060000...2069999): Birmingham, Birmingham (BIR) Read more about +44-121-(2060000...2069999)
+44-121-(2210000...2219999): Birmingham, Birmingham (BIR) Read more about +44-121-(2210000...2219999)
+44-121-(2660000...2669999): Birmingham, Birmingham (BIR) Read more about +44-121-(2660000...2669999)
+44-121-(3000000...3009999): Birmingham, Birmingham (BIR) Read more about +44-121-(3000000...3009999)
+44-1223-(609000...609999): Cambridge, Cambridgeshire (CAM) Read more about +44-1223-(609000...609999)
+44-1223-(600000...600999): Cambridge, Cambridgeshire (CAM) Read more about +44-1223-(600000...600999)