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That's correct and could cause the opposite problem (where a legitimate callerID gets blocked). Smaller telcos restrict the outbound callerID to only CallerIDs

by bkruse 10y ago

That's correct and could cause the opposite problem (where a legitimate callerID gets blocked). Smaller telcos restrict the outbound callerID to only CallerIDs (DIDs) that you own. This would be very difficult to enforce for a wholesale carrier - where their customer is an aggregate of thousands of customers.

MichaelGG 10y ago
It's not even feasible. Like IP, the outbound calls go via many paths. So like ISPs almost never filter your source address, same for telcos. Small ones with tiny accounts might, but no one even remotely on wholesale. But changing IDs is already illegal, so the FCC could decide to chase it down if enough people complain.
- MertsA 10y ago
  Do you have a source for the claim of caller ID spoofing being illegal? AFAIK that's only illegal if you're using it to further a fraud.
  - MichaelGG 10y ago
    Yeah I knew someone would point that out. In the case of evading robo laws, it'd be fraud, right?
viraptor 10y ago
> This would be very difficult to enforce for a wholesale carrier Billing in telcos is important and has all the details you need. This is either information of who placed the call (if they're your customer) or which carrier the call came from (if they aren't). The only problem right now is that there's no reason for responsible behaviour. As soon as carriers are forced/want to say "stop sending us spam calls, or we stop taking your traffic" to both customers and other carriers, this will get sorted.