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I don't understand the technicalities behind how they do it, but SPAM calls in the US can spoof their phone numbers. I'm not sure if it's pre or post carrier co

I don't understand the technicalities behind how they do it, but SPAM calls in the US can spoof their phone numbers. I'm not sure if it's pre or post carrier connection.

willis936 5y ago
Spam spoofs the caller ID field. The calls are routed by the ISP so the ISP sees everything (including that the source address and caller ID address are differ, ie spoofed) and allow it. It would be trivial to flip the switch on spam.
- xeromal 5y ago
  Sounds like a product you could sell if it's trivial.
  - willis936 5y ago
    They already have the power to stop spam. Stopping spam lowers profits. They wouldn't pay someone for an ability they already have that they actively don't want to use.