To be fair, Trump's FCC was pushing STIR/SHAKEN hard but it takes years for the major telcos to implement and push it downstream to all of the various SIP provi

To be fair, Trump's FCC was pushing STIR/SHAKEN hard but it takes years for the major telcos to implement and push it downstream to all of the various SIP providers that buy numbers from them. https://en.wikipedia.org/wiki/STIR/SHAKEN#Implementation https://en.wikipedia.org/wiki/STIR/SHAKEN#Implementation Biden's FCC is able to take action because those were finally finished and now can enforce with the call source traceability they didn't have a few years ago.