You do know that phone books were invented.... right?
Depends on where in the world u are , in Aus no reverse look up availble lol , so not as easy to find someone ,
But social engineering is popular these days , it depends on how much someone already has been told in passing , and how much you publish about yourself , email address can be just as bad if is the same one u use on Facebook , and ur profile is fairly public , most peps are ok though
How willing are you to change your number if all goes bad? I'd only give out a mobile, never a landline number.
Some phones have tracking systems that can hone in on your phone. Like if you were at a restaurant (cell phone with you) and the person you gave your number too had a phone that could do this,.. then he/she could pull up a map screen and it would show where you were located.
i would be careful. now is rather late to worry about it. you can always have another number assigned to your phone so i guess no major risks.
no clue... he could reverse phone directory and find out your full name.. then with that other things.. I would not worry though :)
Could trace your phone number to the place where you live, which could lead to any number of things.