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+44-8451-(910000...919999): Special Services basic rate: BT’s Standard Local Call Retail Price for BT customers Read more about +44-8451-(910000...919999)
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+44-8717-(060000...069999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8717-(060000...069999)
+44-8724-(390000...399999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8724-(390000...399999)
+44-8724-(400000...409999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8724-(400000...409999)
+44-8724-(410000...419999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8724-(410000...419999)
+44-8725-(170000...179999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8725-(170000...179999)