Did not answer, did not leave a message.

Probable phishing.  These scumbags are looking for live lines that someone answers, so they can include it in a list they sell to other scumbags.  Do yourself a favor and if it isn't someone you know calling from a number you're familiar with, just leave it ring.  That way, the scumbags can't tell if it's a live number or not.

Unknown caller , no voicemail left.

Unknown caller from Cape Coral, FL (no one I'd know), did not answer, no voicemail left

They called. I didnt answer.
No message left.