+44-8434-(530000...539999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8434-(530000...539999)
+44-8435-(430000...439999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8435-(430000...439999)
+44-8723-(880000...889999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8723-(880000...889999)
