I just had the phone ring and the caller ID said NAPAAL so I did not pick it up. I jumped on the computer and it led me to this site.
My Dad put a cool thing on my phone that plays the tune to "Charge!", if it is a local number or number I have on my caller ID list of people I normally call. That way, I also know whether to answe3r it or not.
I have also received numerous calls from the 615-212-4900 number. Have you found out who or what this is? I let my answering machine answer all my calls. As soon as my message is played they hang up. Guess they don't want to talk to a machine. I'll bet if you answer their call it will be a recording.