BBB reports that the number is connected to an advance fee loan scam or check scam. Here is the link http://chicago.bbb.org/article/7702 The number is at the bottom. Look under "Phone Numbers allegedly associated with the above names:"
It is from Skype.
I was surprised tonight when I called my friend's cell phone to hear about the number 612-808-0000 showing on her caller ID screen. I subscribe to Skype to use the over the internet phone feature but I didn't buy an online number from them, so I am usually told that the number that shows up on caller ID's when I make phone calls is usually 123456... or 00000.... but tonight my friend was surprised to see this number. There is your answer.