I got the same call and missed picking up the line and they didn't leave a message, so I called back to see what they wanted. Apparently, they were calling regarding information I had requested for continuing education, which I did, but when I asked what school he was calling for, he couldn't name one. I asked to be taken off his call list and he said he would take care of this.
 Jun 28th, 2010
I got a call from 813-322-3527 on my cell phone. No one left a message. I called back to find out 'who' called. Sounded like a school or call center from the background noise . 813 is a FL prefix.

A woman answered, and when I asked politely to remove my cell # she hung up on me! I called back and a male answered. I told him what happened. He apologized, but wondered why he could not see my cell phone number. I told him I was using my home phone so as not to use up my cell phone 'minutes', besides that number is BLOCKED. When I asked how they got my cell number he said it belonged to someone named 'Louis'. There is no 'Louis' so he apoligized telling me he'd remove my number. I told him both my home & cell phone #'s are registered on the Govt DO NOT CALL REGISTRY. I reported this 813-322-3527 to my cell phone company where it is now BLOCKED.

This seems to be the only way to block them. I don't know how they got my number in the first place.
 Jun 12th, 2010
No message left. dont know who they are.
 May 15th, 2010