+44-20-(33780000...33789999): London, London, City of (LND) Read more about +44-20-(33780000...33789999)
+44-8431-(050000...059999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8431-(050000...059999)
+44-8431-(060000...069999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8431-(060000...069999)
+44-8431-(070000...079999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8431-(070000...079999)
+44-8431-(080000...089999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8431-(080000...089999)
+44-8431-(090000...099999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8431-(090000...099999)
+44-8455-(340000...349999): Special Services basic rate: BT’s Standard Local Call Retail Price for BT customers Read more about +44-8455-(340000...349999)
+44-8721-(730000...739999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8721-(730000...739999)
+44-8721-(750000...759999): Special Services higher rate: up to and including 10p for BT customers (non-internet) Read more about +44-8721-(750000...759999)