Yup, this approach of using mostly similar numbers to the victim’s phone number is the new hotness in robo-calls. NPR had a piece on it last year - https://www.npr.org/templates/transcript/transcript.php?stor...

Relevant quote from FCC Chairman Pai: “Which is the ultimate solution, I think, to this problem, which is to find a call authentication standard.”

And there’s no timeline when that’ll happen. So buckle in, we’ll be here a while.