The problem is not that the originator can be found. The current, existing, legacy, phone system already can find the exact originator. The problem is that en

The problem is not that the originator can be found. The current, existing, legacy, phone system already can find the exact originator. The problem is that enforcement of breaking the regulation is so non-existent that the criminals just place millions of calls knowing, at most, they might get a minor slap on the wrist that can be budgeted for as a "cost of doing business". Every single call carried across the phone network is billed, and every hop along the path knows who to bill for their part of carrying the call. The billing system is the method to trace back to the originators, and then apply a fine sufficiently large enough to no longer be a cost of doing business. But the regulators seem to have no idea that the billing system provides the traceability to find the criminals and then go after them. Instead we get things like stir/shaken that are trying to patch "authenticity" on top of a network never designed with that in mind.