I keep receiving a call from this number, I don't answer any number that is not listed on my contact list but I am also on the do not call list.  I have enough phone calls to be dealing with people who do not want to release any other information about themselves.

Hangs up or threatens scary things when asked who they are. Reported to police as threats were pretty nasty, don't even know why they are calling.

Always call in, but no answer when I picked up phone.

I answered a call from this lunatic and he threatened to "hack my xbox account". I don't have an xbox. Apparently he's an attorney from dallas.

Hangs up when asked who they are.

They keep calling, though I have asked them to stop.  I am also on the do not call list, thus the calls are illegal.  If I answer and ask who they are, they hang up.

This is a number for an attorney in the Dallas area.  Hangs up when answered.