I got a voicemail from this number claiming to be the IRS that they were investigating me for a criminal matter and that if I didn't call back I would be taken to court. It's definitely a scam.
Happened to me an hour ago. It was a recorded message. Missed the beginning of the recording due to my answering machine greeting, but it was the same idea, something about my name and a lawsuit and to call them back at 347-480-1721. I am listing them here as a "Prank Call" because I am certain that I am not listed in any lawsuit!