There's no such thing as "free". Most free vacations require you to spend half of it listening to a high-pressure timeshare sales presentation. Or they make you pay so many minor charges you end up paying several thousand dollars for your free vacation.
Unknown caller, got only one ring, probably intercepted by my nationally acclaimed call blocker service that when mentioned in this forum, gets the narrator's attention for whatever reason.
Quote from find a caller: "This number called me and it was a friendly man's voice which asked, "Can You Hear Me?" He then starts talking about a vacation package. I'm afraid it may be a scam to get you to say, "Yes" and they may record it to access your account information and make unauthorized calls on you phone bill, charges on your credit cards, utility accounts, etc."
This is a scam reported on Louisville News Stations earlier this year. Block it.