+44-8456-(360000...369999): Special Services basic rate: BT’s Standard Local Call Retail Price for BT customers Read more about +44-8456-(360000...369999)
+44-8702-(890000...899999): Special Services higher rate: BT’s Standard National Call Retail Price for BT customers Read more about +44-8702-(890000...899999)
+44-8717-(090000...099999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8717-(090000...099999)