You know those calls where you go to pick up the phone and the line is dead, and its a telemarketing call, of some sort, but you dont know who it was ?, well I googled a number the other day and found this site
Which tells you who the owner of the number was. I know its a dot com site so may not be of massive use, but it certainly found the 2 uk numbers I entered into it, one of which was Norton bloody Finance !! You can block calls using TPS, but if you've made an initial approach to one of these companies, I'm not sure TPS works.
Next question, I get pestered stupid by a company I've never used at work, and I need to take extreme action to stop them calling me, as no amount of words or hanging up, or threats of action on my part makes them stop, anyone got any ideas?