Got two calls from this number within the hour. They just hangup when i answer.

Said he was with IRS. I told him stop calling and that I was reporting number to authorities.

I have been getting calls from this same number since yesterday. I haven't answered but tried to call back and get a message that it's a wrong number.

Called 4 times in 3.5 hrs.  Really annoying.

This number has called me 7 times today. On the sixth call, I answered and  it was a man that could barely speak English. My caller ID said the call was coming from Washington, D.C. The man on the phone tried to tell me he was calling from Houston, TX. I told him to stop calling me and hung up. But they're still calling me.