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+44-121-(3160000...3169999): Birmingham, Birmingham (BIR) Read more about +44-121-(3160000...3169999)
+44-121-(3670000...3679999): Birmingham, Birmingham (BIR) Read more about +44-121-(3670000...3679999)
+44-1223-(972000...972999): Cambridge, Cambridgeshire (CAM) Read more about +44-1223-(972000...972999)