I got a call on my home phone.  Not too many of us still have land lines.  The messages was, the IRS was filing suit against me.  I needed to call this number.  Was not a person, was a recorded robot.  They did at least say "Thank you" at the end of the call.  Got a similar call about a year ago from a person who left a different number.  I reported that to the FCC.  Will report this new number to the FCC.  The FCC actually took the information and I got a letter from them.  Don't know how much follow-up the FCC does, but they did take time to write me.  The IRS wouldn't leave a number because you could never get through if you try to call them back.