+44-8431-(170000...179999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8431-(170000...179999)
+44-8431-(180000...189999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8431-(180000...189999)
+44-8431-(190000...199999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8431-(190000...199999)
+44-8431-(200000...209999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8431-(200000...209999)
