I have received multiple calls from this number claiming to be the IRS. The calls are made to my unpublished emergency landline used for my security system and nothing else. Many years ago I did have to repay the IRS for money I had borrowed from an IRA. This is NOT the way the IRS contacts people regarding payments or lawsuits. Here is a link I found regarding these calls. http://www.cnbc.com/2015/10/28/guess-what-thats-not-the-irs-calling.html