This number called my cell phone at 1:51 pm, left a message to return call.  I called the number from my land line, guy answered "This is the IRS, how may I help you."  Heavily accented.

Scam group claiming they work for the IRS. These guys are the lowest scum on the planet. Call back and screw with them... It's hilarious and wastes time they could be trying to scam other folks.

This number calls and says that we are being sued by the IRS and this is your last call!!! First and foremost the IRS does not call you from a cell phone and says this. They ought to be reported to the IRS for impersonating a federal employee!!!