Scam recording, man with Indian accent:  "This message is intended to contact you. My name is Kevin Mason and I'm calling regarding an enforcement action executed by the US Treasury intending your serious attention. Ignoring this will be an intentional attempt to avoid initial appearance before a magistrate judge or a grand jury for a federal criminal offense. My number is 708-292-6166 . . . I advise you to cooperate with us and help us to help you."

Other sites similar to 800 notes have reports of many similar calls from this number. A good number to block proactively.

Received a call from "Kevin mason"

Kevin Mason

Same as above--enforcement action by U.S. Treasury. The automated voice almost sounded like Stephen Hawking.

Same as above. Kevin Mason- US Treasury