Called and left no message. I don't respond to unrecognized callers. If they are calling others and not leaving messages, then the chances are good it is a scam/
Received a call from this number. They said they were "American Security Systems." They asked if I currently had a security system and if I would be interested in receiving a free security system in exchange for advertisement for them. All I had to do was put their sign in my front yard. But first a couple of questions, 1) Do you currently own a security system; 2) are you currently under a security contract. When I answered both questions, they asked for the owner of the home. I said, "that would be me," they said thank you and hung up. I've been scammed - and now they know too much about me. I sure wish I had handled things differently.