+44-1246-(748000...748999): Chesterfield, Derbyshire (DBY) Read more about +44-1246-(748000...748999)
+44-1248-(517000...517999): Bangor (Gwynedd), Gwynedd (GWN) Read more about +44-1248-(517000...517999)
+44-1250-(500000...509999): Blairgowrie, Perth and Kinross (PKN) Read more about +44-1250-(500000...509999)
+44-1254-(441000...441999): Blackburn, Blackburn with Darwen (BBD) Read more about +44-1254-(441000...441999)