+44-8444-(870000...879999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8444-(870000...879999)
+44-8454-(890000...899999): Special Services basic rate: BT’s Standard Local Call Retail Price for BT customers Read more about +44-8454-(890000...899999)
+44-8704-(890000...899999): Special Services higher rate: BT’s Standard National Call Retail Price for BT customers Read more about +44-8704-(890000...899999)