Overseas call centres
I'm getting increasingly annoyed, on an almost daily basis, by people phoning from overseas (in order to evade the UK legislation on spam phone calls).
Is there anything at all that can be done to prevent this?
Is there anything at all that can be done to prevent this?

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If you mean something else, tell me where I sign up!
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You could try going ex-directory but even that doesn't work as some firms demand a phone number before they deal with you and then sell your number along with every other one they've gathered
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Will registering on the TPS stop unsolicited sales and marketing calls from overseas?
Companies based abroad who call into the UK and who are making calls on behalf of a UK based company, must comply with UK regulations and screen their call lists against TPS before making an unsolicited sales and marketing call to a UK telephone number. We do make the file available to overseas based companies under licence for the purpose of suppression so they know whom not to telephone but many overseas companies who telephone the UK on their own account from overseas do so to avoid legal and self regulatory restrictions. We would advise caution in responding to unsolicited sales and marketing telephone calls from overseas especially if they are asking you to send them money or using a premium rate phone line (numbers beginning with 09). If you are receiving unsolicited sales and marketing calls from overseas you should contact the overseas company who is making the call.
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One other advantage I have is that my number is five digits - and several databases refuse to accept numbers with less than six!
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Another thing that seems to disconcert some of them is that I normally do not answer the phone with "hello", but with my phone number.
Thirdly, I have a slight advantage because they often ask for Mrs (my-surname) and that indicates to me that they're phone-spammers before they get a chance to get into their spiel. Then I will either:
(a) say "not interested" and hang up
(b) say "there's no Mrs (my-surname) here" and hang up
I used to be a bit friendlier to people who were doing surveys, if I had some free time. Unfortunately, I discovered to my fury that this is sometimes done under false pretenses, when the folks who did one survey then rang me up a few days later to try to sell me some service (based on the answers I gave to the survey). It used to be the case that people doing surveys were actually doing a legitimate job, trying to do market research and get feedback and keep their data anonymous. Now these other bastards have now poisoned the pool for everyone else. Grrr.
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Since then I've been very careful about giving out my number. If I have to fill in a number on an internet form, I give them all zeroes unless I actually want them to call me back. As a result, the number of spam calls has dropped dramatically, to only a few each year. And the last one was from the phone company itself :-\
This is in the Netherlands, however, so YMMV in other countries.
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