+44-121-(6410000...6419999): Birmingham, Birmingham (BIR) Read more about +44-121-(6410000...6419999)
+44-20-(02340000...02349999): London, City of London (LND) Read more about +44-20-(02340000...02349999)
+44-1327-(619000...619999): Daventry, Northamptonshire (NTH) Read more about +44-1327-(619000...619999)
+44-1789-(622000...622999): Stratford-upon-Avon, Warwickshire (WAR) Read more about +44-1789-(622000...622999)