I've recieved two phone calls from this number today. Caller ID displays Unknown Name. Didn't answer and as I have my answering machine off they couldn't leave a message. But an Internet search on this number comes up empty so I can only assume it's a spammer. Any legit business would be listed. It's a  Boston  number and I don't know anyone there.

Left v.m. message that caller was from U.S Treasury and to call back asap to get their help regarding the federal offense I had committed.! I dialed *67 then the number, got the same voice as my vm message and asked to speak to 'Mohammed'. He said he was Mohammed, so I went into a vulgar non stop tirade insulting him, his goats, camels, family, religion, etc. while he was trying to overtalk me with his own insults until he hung up on me. A great stress reliever! I've called back a dozen times after that, but either doesn't ring or a quick busy tone.

Beware, the name of the caller changes, the phone number changes, but the message is the same.

Somerville MA
(857) 444-0816
Massachusetts
Tuesday | March 22, 2016 | 8:46 AM PDT | 44 seconds
"Hi my name is David Gray and this message is intended to contact you regarding an enforcement action executed by the United States treasury and tending your serious attention. Ignoring this will be an intentional second attempt to avoid initial appearance before magistrate judge or grand jury for a federal criminal offense. My number is 85744408168. 857-444-0816. I'd like you to call with us and help us to help you. Thank you."
(From Comcast readable voicemail)

This is a total sickening scam.

nothing new here - looks like david gray has another new number to block