Bria, I just received a call from this number. It sounds like and smells like a scam to me. The call started with a pre-recorded message about an FBI report that home breakins are on the rise and that, in return for agreeing to have a sign placed on my lawn, I would receive a free alarm system. All I needed to do was press 1 to speak to a customer service agent or press 9 to be placed on their Do Not Call list. I hung up immediately. I am speculating that:
1. The alarm system is cheap (possibly from a Radio Shack or other electronics store) and you have to install it yourself, and there's no monitoring service. Nobody gives away a quality alarm service for free without some strings attached.
2. By pressing 9 on your keypad, you've confirmed the phone number is active and might be sold on a list to other telemarketers.
3. The sign reads as follows: I AM A FOOL. I ALLOWED MYSELF TO BE SCAMMED! (LOL)
If you really want a quality alarm system, do a Google search for a reputable security alarm service in your area.
Oh jeez, I thought I was so savvy and always call back to see if I can be put on their do-not-call list, but I bet you are right that it just makes them aware that it is an active number....