Yet another call where no message was left, so it can't be imortant.

Ditto. In my case, it cut off before VM kicked in. Suggestive of a robo-multi-dialer.

no message, no ID--- it goes in the pile.

Made the mistake of answering as I was expecting a call from J'ville.  It was a recording ("Emily") telling me that "Records show that you stayed at one our resorts recently and are eligible..." and I hung up.  I haven't stayed at any resorts in the 20 years, so I knew it was bogus.  There are several other (904) numbers that are running the same scam; I'm guessing they're phishing.  Don't answer and block the number.

Caller ID Jacksonville, FL, left no msg.