I've been getting calls everyday for the last week from that same number. It's the same deal as Jesse. It never says a word, I've actually called it back. It rings sometimes and other times pure silence. I'm calling provider today and getting it blocked.
This individual JUST called me for the 4th time. I have no idea who it is. I'm getting really annoyed with it too. Wonder if I have any blocks left in my verizon account left...