caller id says alarm co. they leave no message.

Received this call about an hour ago. No message was left. CID read Denver, Co.

Called me and I picked up the phone. An automatic voice message told me that I "won"a "free" installation of anew alarm system or something. Hang up right away. It's a scam, don't bother.

Called and left no message.

Called, left no name.  When I called the # back, appears to be a telemarketer, you can press #5 to be put on their "do not call list".  I'll believe that when I see it!