May be IRS scam. Left automated voicemail that's partially cutoff referring to some case and asking to call back. Not going to.

SCAM!!!!  Called number back with this 773-897-1092 number as my caller ID and "officer Paul Smith" from the IRS answered with a very thick accent.  He couldn't understand how I could be showing his number like as my caller ID.  Looks to be a data gathering call center in eastern europe looking for personal credit information, based on their IP address.

Total scam-they claim to be with IRS having a lawsuit against me
Since I wasn't home they left a message-when I tried to call them back all circuits were busy-guess they were trying to scare off some unsuspecting souls. Scum bags.

Very hostile !  Partial VM left with this number.  When I called back, I asked for the name of the company and a guy with an Indian accent claimed to be Jeff Johnson from the IRS.  I replied "Yeah, sure you are." and hung up.  He called back immediately and threatened to come here and violate me a number of different ways - very colorful language.  My admin (who answered the phone) told him to come on over because she had a bullet waiting with his name on it.  She probably isn't joking, which is why I stay on her good side.