This number has been calling me for days, with the robo message about the IRS filing a law suit against me, blah blah blah. I finally got mad and called them back; a foreign man answered claiming to be officer so-and-so, as soon as I said "stop calling me, I've reported this number" he hung up. Total scam, definitely NOT the IRS, don't give them ANY of your personal information!
This is a robo phone call supposedly for the IRS. They tell you they have been trying to reach you and that you are going to be arrested. Then they tell you to call their phone number for more information.