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+44-8444-(080000...089999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8444-(080000...089999)
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+44-8447-(020000...029999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8447-(020000...029999)
+44-8450-(370000...379999): Special Services basic rate: BT’s Standard Local Call Retail Price for BT customers Read more about +44-8450-(370000...379999)
+44-8700-(570000...579999): Special Services higher rate: BT’s Standard National Call Retail Price for BT customers Read more about +44-8700-(570000...579999)
+44-8712-(030000...039999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8712-(030000...039999)