Just got a message and called it back. He asked for my grandpa who died 7 years ago then asked for my dad. When I questioned him he said I'd be put in jail and do you know what I'm doing messing with irs. Asked for badge number and he said he was James Martin with some fake badge number. Was an Arab fella who did not speak English very well at all.
Just got a call from this number, let it go to messages. They left a recorded message claiming that this is an "official IRS" number and implying that I should call back. I will not do that of course, based on other comments here.