I called the number and it appeared to be an Verizon activation site for phones purchased from Target, WalMart, etc. with no selection to talk to a real person to tell them that I had made no such purchase. From reading the variety of different types of calls from this number, sounds like a scam.
I received a call from this number this morning. I wasn't home, they didn't leave a message. Called it back tonight and after several rings I got a message from Verizon stating the number was no longer in service or had been disconnected.