Called today, said I had won a prize for taking a survey. (I dont take surveys)  All I had to do was let someone demonstrate a tri-star vaccum cleaner.  
 It's a sales call trying to claim it's part of a survey so they can say they're exempt from the National Do Not Call Registry.

They have been calling my house and hanging up when my answering machine picks up!  very annoying

All I know is that it comes up on my caller ID as ONYXX. Hope this helps. It actually is a number from Tallmadge, Ohio.

same as message above.  they told me I was the winner of $250 gift card for answering a survey 9-12 months ago.  I said I did not participate in any survey and she quickly said "ok, bye"

I kept getting calls from this number and did not answer because I don't recognize the number. They did not leave a message. I finally called it back the other day. I could not understand the name of the company when the person answered the phone. I asked who they were and why they were calling. The guy's response was 'Well, who are you and then I'll tell you.' He was really cocky and I asked again who they are and why the keep calling me. He did not want to tell me and kept asking for my name. He finally said something about a sweepstakes (I haven't entered any). I told him I wasn't interested. Haven't received a call from them again. They were calling 2-3 times a day.