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by eru3 hours ago |
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upvoteby KSteffensen31 minutes ago|
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Here in Denmark there is no block list, but you have to explicitly opt-in to receiving telemarketing calls. By default, it's illegal to call you.

I never opt-in to anything. If I do get a call, I usually ask for the callers employee name and employee ID, their supervisors name and employee ID and the name of the company. Then I point out that it is illegal to call me and ask for them to get my name off their list.

It's been years since I've gotten any sort of telemarketing or survey call.

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upvoteby ValentinPearce3 hours ago|
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I assume ownership of the caller's number can be logged/checked.

I haven't had too much trouble with telemarketers lately but there is a crowdsourced app in France called Saracroche that can be easily installed on your phone and blocks spam numbers by becoming the caller id service. You can also use the app to report a number and help build the huge database.

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upvoteby eru3 hours ago|
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> I assume ownership of the caller's number can be logged/checked.

Alas, last time I checked numbers were something that was announced in-band, so it could be trivially faked by the caller. But I'm not sure if that's still true.

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upvoteby Sayrus2 hours ago|
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Not in the domain at all but wasn't this the purpose of STIR/SHAKEN but the biggest blocker was that large telcos hadn't deployed it? I think Android and iOS dialer app show you whether there was Caller ID Verification done or not so you may be able to drop anything unverified.
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upvoteby vbernat2 hours ago|
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In France, thanks to STIR/SHAKEN, this is not possible any more for the fixed phone numbering plans (and telemarketers have to register their phone numbers in a subset of this numbering plan). For mobile lines, this is still not 100% implemented due to the difficulty of handling roaming, but I think it is becoming efficient as I didn't have a telemarketer with a mobile number since a long time (they seem to hide their number now).
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upvoteby petu3 hours ago|
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Phone number always belongs/registered to someone?
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upvoteby eru3 hours ago|
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Alas, last time I checked numbers were something that was announced in-band, so it could be trivially faked by the caller. But I'm not sure if that's still true.
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upvoteby petu1 hours ago|
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Spoofing a number can be a felony on it's own.

Even if there's no explicit laws around that, who's getting billed for the calls?

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upvoteby XorNot1 hours ago|
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That's where we can actually use technical solutions though: businesses shouldn't be able to place calls without cryptographically signing their origination with a key derived from their business registration.

Phone calls are essentially end to end voip these days so we have the ability to deliver that metadata.

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