I just got a call from a cell phone at 9:an Monday 3/27/16 saying that it was the IRS and they have filed a law suit and to call this number back 404 790 1702.This is the first time.They also said that they have been trying to contact me.and also said this is your last call.I did not call this 404 number back.I have been getting calls fron unknown number on the callar ID I don't answer those.
Call blocker might be of some help. Also don't pick up on numbers you do not recognize, or where there are caller IDs that seem odd. Or where there is no caller ID. There’s no way to stop the calls from being initiated. Calls originate in India and Pakistan and as such they callers are beyond the reach of US law.