If it is a mobile, you cannot tace them for security reasons. if it s a buisiness number or home number, you can search in the phonebook or online for the address.
If it is your 'friend' would he have not told you were he lives!?
Oh and a little advice, I would not advertise my e-mail address on a public forum, anyone can get hold it and sign you up for SPAM!
Use the websites built in PM system for messages, don't advertise your mail address to the world!