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+44-8723-(480000...489999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8723-(480000...489999)
+44-8723-(490000...499999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8723-(490000...499999)
+44-8723-(500000...509999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8723-(500000...509999)
