Received a call from this non-existent number today, obviously yet again as a result of information stolen or sold by TalkTalk call centre staff. As what appeared to a 'real' number showed I answered, but it was simply another 'silent call' until a machine 'voice' said simply 'goodbye'. This was almost immediately followed by an 'International' call that I have been driven mad by and now answer but say nothing, hopefully on the basis that it is costing them money to make it! Wish we could sue TalkTalk for failing to secure their information database correctly!
United Kingdom