This "person" called multiple times today while I was at work. I only keep my phone on and near in case of a family emergency. This was very disruptive.
I think it's like a 'hub' that a lot of marketing calls go through. I got a message from my cell phone provider that was from this number. They left me a message and listed an -877- number to call them back at. So don't worry, it's not like it's a long lost reletive trying to give you an inheritance or anything.