I just returned the call. It is from a "reward redemption". It claims it is calling "because you've visited one of out affiliate's websites". It's the same type of junk we get in our spam boxes but they are now calling us at home or work.
I'm on the do not call list and this # called today at 12:52- one ring- I think it's that scam where if you answer your phone it'll be dead air but you will be charged...