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+44-8437-(010000...019999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8437-(010000...019999)
+44-8437-(020000...029999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8437-(020000...029999)
+44-8437-(030000...039999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8437-(030000...039999)
+44-8437-(040000...049999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8437-(040000...049999)
+44-8437-(050000...059999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8437-(050000...059999)
+44-8437-(060000...069999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8437-(060000...069999)
+44-8437-(070000...079999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8437-(070000...079999)
+44-8437-(080000...089999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8437-(080000...089999)
+44-8437-(090000...099999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8437-(090000...099999)