bait and switch number. calls and then hangs up without leaving a message. when you call back its a recording telling you that it recognizes your phone number as a subscriber number, and that you have visited a web site recently trying to win 2500 "travel" points. it then tells you you've been selected for those points. well they must not make very much money since i've been selected about 15 times in the past 6 months! it does give you an option to press "3" and un-subscribe to their list... give them 7 days. (i'm sure its complete b.s.).
They call, leave a message, tell you to call back. When you do it goes to an answering machine. They are just checking to see if its a working number. Then they call you back a month or so later, same thing again.