called and then hang up before talking. Most likely a Dial Bot with an answering machine message. Or someone trying to clone my number?

Just got the call. I tried calling back on another line, and on my phone but got a busy signal.

My guess someone dialed the wrong number (doubts because there's another comment here)

I called back  and they hung up

I tried again, and still busy. hmmm

Called and left no message. Suspect it was a bot