I called this number back and got an automated announcement stating my number was recognized as a subscribing number and that I had been entered to win 1000 dollars. It went on to say that I had entered via the internet (which I had not done) I hung up at this point.
I get this call a lot on a Government phone. They say they are from WCA Customer Service. They say you can unsubscribe but they make you listen to a 20 speal first. I unsubscribed 3 times and they still keep calling.