+44-8446-(630000...639999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8446-(630000...639999)
+44-8458-(120000...129999): Special Services basic rate: BT’s Standard Local Call Retail Price for BT customers Read more about +44-8458-(120000...129999)
+44-8700-(440000...449999): Special Services higher rate: BT’s Standard National Call Retail Price for BT customers Read more about +44-8700-(440000...449999)
