+44-8431-(210000...219999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8431-(210000...219999)
+44-8431-(220000...229999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8431-(220000...229999)
+44-8431-(240000...249999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8431-(240000...249999)
+44-8431-(260000...269999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8431-(260000...269999)
+44-8431-(280000...289999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8431-(280000...289999)
+44-8437-(890000...899999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8437-(890000...899999)
+44-8455-(360000...369999): Special Services basic rate: BT’s Standard Local Call Retail Price for BT customers Read more about +44-8455-(360000...369999)
+44-8704-(760000...769999): Special Services higher rate: BT’s Standard National Call Retail Price for BT customers Read more about +44-8704-(760000...769999)
+44-8721-(950000...959999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8721-(950000...959999)
