+44-8435-(810000...819999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8435-(810000...819999)
+44-8435-(830000...839999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8435-(830000...839999)
+44-8435-(840000...849999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8435-(840000...849999)