+44-1246-(399000...399999): Chesterfield, Derbyshire (DBY) Read more about +44-1246-(399000...399999)
+44-1452-(918000...918999): Gloucester, Gloucestershire (GLS) Read more about +44-1452-(918000...918999)
+44-1470-(680000...680999): Isle of Skye - Edinbane, Highland (HLD) Read more about +44-1470-(680000...680999)
+44-1688-(630000...630999): Isle of Mull - Tobermory, Argyll and Bute (AGB) Read more about +44-1688-(630000...630999)
+44-1806-(710000...710999): Shetland, Shetland Islands (ZET) Read more about +44-1806-(710000...710999)