I received a call from 347-618-6889 with a robotic recording saying:

Hi, this is the tax crime investigation unit of IRS.  The reason you are receiving this pre-recorded message is to notify you that IRS has issued an arrest warrant against you right now.  You and your physical property both monitored and it is very important that I do her back from you as soon as possible before we proceed further in any legal matter.  My direct call back number is 347-618-6889.  The number again is 347-618-6889.  Thank you.

I called that number and talk to the people at the call center.  I told them I was Donald Trump.  I also told the operator that what he was doing was illegal and immoral.  This organization called back later on March 1st from 408-675-7971.

I have done this several times and the people on the other end are clearly in a poorly organized call center.  They do not pick up the phone quickly or identify themselves as the IRS and they act very sketchy.

They have now called me twice from that number and once from 408-675-7971.  The most recent call on March 1st, 2017 at 3:51 PM.

https://www.fbi.gov/contact-us/field-offices/sandiego/news/press-releases/internal-revenue-service-telephone-scam

I filled out the above page.