Telecoms know if a number is spoofed or not. All I want is for them to wholesale steal the original Twitter "verified" check, and use it to confirm that a call is not spoofed.
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
