[tkems]

This was my thought too. While I do think going after this kind of scam is a good first step, I don't see overseas operators not using this any less. Most spam calls I get don't follow the do not call list, why would they follow this either?

I think the FCC needs to step up and have a hard deadline for STIR/SHAKEN with fines for operators who don't comply. That is the only way, IMHO, that the VOIP operators will take it seriously.