This number showed up on my Caller ID about 6:00pm EST. I answered it on the off chance it might be someone I actually know. I paused briefly when I answered, then in a low soft tone, I said "hello". There was a pause from the other end and an automated female voice started with the spiel "Hello...you entered a contest for the Royal Carribbean/Carnival cruise..."
I hung up immediately, because, first of all...I don't enter contests for cruises...period. And secondly, Royal Carribbean and Carnival are not affiliated. They are two independent companies. I've actually been on a Royal Carribbean cruise (but I didn't win it in a contest drawing, and it was a LONG time ago).
This is either some kind of telemarketer, or someone using the facade of a contest to gain financial information about you. If you get a call like this, don't answer, but if you do...hang up as soon as you hear them start about a contest.