+44-8436-(910000...919999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8436-(910000...919999)
+44-8455-(690000...699999): Special Services basic rate: BT’s Standard Local Call Retail Price for BT customers Read more about +44-8455-(690000...699999)
+44-8700-(140000...149999): Special Services higher rate: BT’s Standard National Call Retail Price for BT customers Read more about +44-8700-(140000...149999)
