+44-8453-(440000...449999): Special Services basic rate: BT’s Standard Local Call Retail Price for BT customers Read more about +44-8453-(440000...449999)
+44-8704-(990000...999999): Special Services higher rate: BT’s Standard National Call Retail Price for BT customers Read more about +44-8704-(990000...999999)
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+44-8712-(820000...829999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8712-(820000...829999)
