4 ms·

What's untraceable about it? The carriers know the original phone number and know when it doesn't match the caller ID field. There is no technical limitation.

What's untraceable about it? The carriers know the original phone number and know when it doesn't match the caller ID field. There is no technical limitation. It is allowed behavior and that must change.

xeromal 5y ago
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.