I, too, have gotten phone calls from this number. I have not answered it when they call, and they leave no message. Called the number back and it's a Verizon message saying it's been disconnected. Perhaps the Verizon message was recorded to a voicemail or answer machine to give the illusion of a disconnected phone when it's not.
This number called me few weeks ago it was a phone solicitor I told him I was not interested. I then informed him that my number was on a do not call list and told him not to call me again. The number then called me yesterday but I was unable to answer it, and did not leave a message. They then called again today and I answered it was the same man that I spoke to earlier. I told him again to stop calling me and that it was illegal to call a number on a do not call list and to not call me again. He whispered into the phone F*** You twice and hung up. The number is out of Bristol Tennessee, it cannot be called back though. The number comes up as not listed, I hope this will help this number from harassing people.
if you have a cell phone your phone company can black the number or you can do it online in your account through your phone company. I know for a fact verizone has this option. I have used it in the past and will use it for these guys as well. Hope this helps