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The originating provider knows, but do providers downstream know? If AT&T receives a call from $MadagascarPhoneCorp who indicates the call is officially from $IndiaPhoneCorp, can AT&T trust that?

>The STIR system aims to add information to the SIP headers that allow the endpoints along the system to positively identify the origin of the data. This does not directly prevent the ability for a robocaller to spoof a caller ID, but it does allow upstream points to decide whether or not to trust that ID

https://en.wikipedia.org/wiki/STIR/SHAKEN#STIR

It's not all the way there, I guess.

I don’t need a “verified” tag. No spoofed call should ever get through. Ever. When would I ever want a spoofed caller ID? Never.

My iPhone (on Verizon) already does this.

They should also display something indicating it is not verified when it is not