+44-20-(34060000...34069999): London, City of London (LND) Read more about +44-20-(34060000...34069999)
+44-8431-(770000...779999): Special Services basic rate: up to and including 5p for BT customers (non-internet) Read more about +44-8431-(770000...779999)
+44-8455-(350000...359999): Special Services basic rate: BT’s Standard Local Call Retail Price for BT customers Read more about +44-8455-(350000...359999)
+44-23-(94040000...94049999): Portsmouth, Portsmouth (POR) Read more about +44-23-(94040000...94049999)