In Spain we have something called "Lista Robinson" (in Sweden exists something similar, called "NIX-registret") which are basically opt-in lists where you can enter your phone number, then once the new lists been distributed, the telemarketing companies cannot call you, if they're doing things properly. If they call anyway, you just mention you're on the list, they hang up, and remove your number from the list they have, eventually you stop getting calls.
I think in both countries these methods are supported by actual laws, one via "advertising-exclusion systems" that the companies need to respect, and in Sweden via the Swedish Marketing Act which forces companies to not call people who've "clearly objected to that method" or something similar. I'm sure similar laws and lists exists in other countries too. Obviously hospitals, doctors, utility companies and similar don't cross-reference against these lists, as they have actual relationship with you already.
Both in Sweden and in Spain I used to receive a lot of spam calls, like multiple per week, and once enrolled on these lists, the calls are non-existent, the only telemarketing calls I get now are from the companies I already have relationships with, which happens maybe once a month.
If you suffer greatly by the constant spam calls, like I did once before, do take a look and see if there are similar opt-out lists in your country :) They may take a month or two before actually eliminating all calls, but they do work, apparently.
For all these countries that don’t get scam calls, it has nothing to do with your do not call list since these are criminals anyway. It has to do with the fact that Americans are Legion and have a lot of money.
Same in Norway. I have been on the list for decades, and I never receive any unwanted calls – except from my mother (j.k love you mum!)
I am not sure why it works so well here. I have vague recollections of news articles about it being ignored in the past. I guess they just struck down hard on those. Also, I imagine if you put yourself on that list you would be really grumpy if someone called to try to sell you something.
Most countries have these no call lists but they are fairly useless as there is no enforcement.
I've even heard stories of some scammers exclusively using such lists, as they are pre-verified!
It was the case in France too, it was called Bloctel; you just had to register your phone number and telemarketing companies had a legal obligation to look it up and not call you.
So it worked for a time, legit companies stoped calling; however most people didn't knew about Bloctel as it was little advertised.
Meanwhile, spam calls turned into scam calls, and a real issue especially with the elderly.
So I think that banning all unsolicited calling kills two birds with one stone, spam becomes illegal and scams as a consequence becomes easier to spot as there are no more unsolicited calls.
We have a "do not call" list in the us. It's effectively worthless.
We have a similar list in America [1] and Canada [2]. Unfortunately, like any regulation, its efficacy is only as good as its enforcement, so my understanding is they're both routinely ignored. Particularly grim for the Canadian case -
> In January 2009, numerous media and consumer advocacy organizations reported that anyone can use false information pretending to be a telemarketer and download a set of numbers from the list for a $50 fee. It took their reporter ten minutes to do so. It has been proposed that list may be being downloaded and used as a telemarketing list overseas, where there's little that can be done as the CRTC has no jurisdiction outside of Canada
[1] https://en.wikipedia.org/wiki/National_Do_Not_Call_Registry [2] https://en.wikipedia.org/wiki/National_Do_Not_Call_List