Wow! I WON 5 days at a Hilton!! (Not..) Even if my number is on the Do-Not-Call List, these scammers still manage to call. They called again today -- often they call using the same area code and exchange as my local phone - just different last digits to make it look lie it's someone in your neighborhood.
They call me every other day and never say a word. I just hear a series of beeps, and then it hangs up. I called it back, and it went to AT&T directory assistance.