No message as I did not answer.

I accidentally called back and the automated voicemail offered option 1 to be added to the "do not call list".

We will see if that works!!!

Called but didn't leave a message.  Strong indicator this is a telemarketer/scam.

received call...  did not answer   - did not leave message.   I have been getting a lot of these

Did not answer the call and no number left

It doesn't help. You number goes to others