Phone numbers

I am much more comfortable with someone having my phone number when I gave it to them myself, or gave someone else permission to give it them. Now, if someone didn't get my phone number from me, but then calls me, I would like it if, preferably during the salutation, the person calling me says "I got your number from ________ ." I can live with that.

If someone straight up asks for my phone number, I will, most likely, give it to them. Unknown numbers are disconcerting, but less so than listening to the voicemail that is from someone I never intended to have my phone number.