Missed a call.. redial the missed number and it never rings just disconnects prior to ringing. Unknown caller from Phoenix AZ and I'm on the do not call list

call from this number, searched it on the internet and found this page.  no message was left from the caller.

Unknown call to my cell that I did not answe and that is on the Do Not Call Registry.  I really hate these unknown calls, especially If they are scammers.  I really with we could find a way to fry their [***] so that they would STOP IRRITATING PEOPLE WITH THEIR CRAP and STOP SCAMMING.  I am so sick and tired of this.

YUP Call but no message and no response at all-

Same thing here.  Missed call, no message, no ringing on call back.  Currently in my phone as "Mystery Number."

In the past I have gotten calls from the University of Phoenix. It would ring once and hang up.  I called them and asked them to remove my name from their databanks but they kept calling.  They eventually stopped, but now I'm receiving these calls.  I have never been able to answer, though.  I'm usually in the bathroom when they call.  I wonder if they know...  ominous...  

Has anyone every answered a call from this number?  Or have you checked your phone bill after receiving these calls.  I wonder if there is some sort of money making scam involved.