if you have time, call them up and waste their time. every person on the line uses up a channel for their calls, which i'm sure is being routed to some bumhick place in india. which will cost them a pretty penny in connection fees. i just wasted 5 mins of their time. when they ask for a phone number/address i give them the FBI headquarters information
The call I received from the number 1.646.809.9667 left me a voice mail saying they were the IRS, so I called it back. And I told the guy that the IRS will not contact anyone by phone, and that his number was already listed online as a IRS scam. He got irritated and said that the police would be at my home address within a few hours to arrest me.
Got 2 calls from this number. Very broken English for an IRS agent. When I said my name he repeated the wrong name. I said No, he said F you and hung up.
Claimed they were calling from the IRS and this was a 2nd attempt to get me to appear before a Grand Jury for a Federal Offense and I would be arrested
Claimed to be the IRS threatening criminal offense for not returning their call. Scary that they are aren't shut down yet. People are probably falling for it.