Similar experience as others here. 360-807-5520 left a message saying the IRS was filing a law suit against "You".
For those who don't know, the IRS would never leave a blind message like this. SCAM! SCAM! SCAM!
Been out of town. Got two messages on my answering machine saying I was being sued. Left the number 360 507 5526. I was pretty sure it was a scam but I called t.number out of curiosity. A recording said nothing but that the call could not be completed. The IRS doesn't do business over the phone like this. Don't fall for it.