Re: Messing with CLI numbers
All the cold calls I get have a CLI of "international". It appears that the call centre - obviously staffed in the UK - is relaying through another country.
I am sure you are aware that there are call centers in India that are staffed with people trained to speak with a given accent. It is usually done for debt collection as it was seen that talking as the neighbour next door helps in that regard, but may be done for other kind of business too.