Received an unwanted, unsolicited call from this number to my private cell today.  It was a robocall that went to my VMS.  The message was:  "This case file, please call immediately on our department number 202 375-4789. I repeat 202 375-4789."  No other identifying info was given.  I "googled the number and found multiple complaints about this number on other sites.  There were nine spam complaints within the past 90 days on premium.whitepages.com.  Other sites also had complaints.  Given the internet search info and the fact that whoever these callers are they choose to hide their Identity, I was left to presume they are likely spammers.  I have now blocked them on my cell and home phone.

Just received a call from them shortly ago. Thank you for the information!

We have been trying to reach you.  This is the IRS... (at which point I hung up on the call.)

Fake IRS call from 202-375-4789 about pending court action...

Foreign that I couldn't understand - SCAMMER!!!!!!!!!!!!!!!!!!!!!!!