They called twice so far today. Says the number originates from Provo, UT. Also if you try and call them back you get an automated message saying you can't complete the call as dialed (something to that effect). This is the third number in the past 24 hours that I received calls from where I was unable to call back. One of them said the number was out of service. Just block them. I hope slim is right about the illegal and robo call block. I'm at the point where I don't want to answer my phone.
[***] have called 5 times today, I keep routing to my fax but they won't stop, answered it the last time and told them to take me off their list. Reporting them to Do Not Call