My son received a call for this number worried that he was going to be sued by the IRS for back taxes. Ironically he files with a professional software package. Never an issue. So I called to see what I could dig up and immediately he identified my name. Caller ID I guess. Told me I owed $8,700 and was being investigated. I challenged him regarding the "round number" and that his number was listed repeatedly on the web as being an IRS Scam. "click". Son received the same "click" when he challenged the claim.