reverse tracing regular phone numbers is easy, and i could give you a site to do it... cell phones are another story, since the only way it would even come up with ANY info on them is if they're on a month - month contract, if it's prepaid there would be no way to do it. and i don't think there's any site just to reverse cell phones, so in short... no there is no way. just like someone said, get a girl to sound like a slut and if they're 'male' enough then you'll have their addresses within minutes. and if you want a really loud one, it doesn't do much damage but it sure would scare the shit out anyone close to it, take a two liter and put about to cups of water in it, then put quite a bit dry ice in it and close the lid, chunk near his window and run... last time i did it i was expecting the loud sound (it's actually unbelievable how loud it is, my ears rang and i was inside when it exploded) and i still nearly shit myself...