+44-8436-(940000...949999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8436-(940000...949999)
+44-8455-(680000...689999): Special Services basic rate: BT’s Standard Local Call Retail Price for BT customers Read more about +44-8455-(680000...689999)
+44-8709-(430000...439999): Special Services higher rate: BT’s Standard National Call Retail Price for BT customers Read more about +44-8709-(430000...439999)
+44-8725-(540000...549999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8725-(540000...549999)
