From the search I performed on the number it looks like the calls are being generated from a computer IP address in Chicago- this has got to be a telemarketer! blocking them from calling my phone!
Ok, so after three calls to my cell phone within two hours, I finally answered the 4th time. A heavily accented woman said she was calling from getafree.us or getitfree.us or something to that effect. I told her to put me on the no call list and NEVER to call my number again. We'll see what happens.