robo message saying a case file against you please call back us back on 424-350-8761

This guy keeps calling from a cell phone saying he is from IRS, obviously a scam

Fake irs we're sueing you bla bla bla scam tell that person in India to go [***] himself from me.

robo call to dial back the same number. Called back, started asking probing questions. They hung up. Called again. Started asking the same questions about their agent ID (since I've spoken to actual IRS agents, I know how they answer and the info they always provide). ID was not the same type of number, so I told the guy as much. Hung up again. Called back to talk to a supervisor. Hung up again. Now they are hanging up as soon as they see it's my number. LOL Bunch of f*ing idiot scammers! Unfortunately, they probably ARE getting a ton of money from people who fall for it. I just wanted to see how much of THEIR info I could get from them.

Automated call saying IRS has a case against me.  Call came at 7am on a Saturday.  Called back and no answer, so clearly not the IRS...