Called me and no response when answering

Have received several call from this number.  Rings twice and then hangs up.  Probably from a prison inmate.

Let it go to voice mail and never left a message.  I called it back, and let it ring, ring.. never answered, then something strange, it just hung up.  Tried calling it back again, and now its busy.

I receive calls from this number all the time. Today when I called back, I could hear background sounds so I stayed on the line trying to get them to respond. Finally a gentleman got on the line. I ask who he was and he said he was with Dish Network. I told him to take my number off their calling list. I then called Dish Network and was told that it was not them and they do not do outbound calls. This number has been reported to Dish Network and they are investigating. I am already a customer of Dish Network and they don't harass people. This is probably a dummy corporation claiming to be Dish Network.

This was one of several calls received during the same 24 hr period, some as early (or late) as 1:00 A.M.  Others were received from 313-583-3211 and 440-290-2128.  When entered on MSN reverse number look-up, show as unlisted or unavailable.