I received a call from this number and they hang up as you answer and when you try to call back it don't ring our anything it shows as student service on my caller id

free alarm if you keep the sign on the front of your yard!

I just received a call from this number but no one is on the line.  Caller ID only shows the phone number.  Wish I knew how to stop these calls, I am on the do not call list but it doesn't seem to help.

I just received a call from this number at 4:25pm about a home alarm system. I recently registered my number on the national do not call list and ever since I've been getting spam phone calls... what gives?? Whomever it is, knock it off! I don't want any of your crap.

They wanted to put a sign in my yard because there has been so many breakins. The voice for more information, please press 1