spornybol, are you on a Windows machine? If so, it's really easy, I think even YOU could do this..

click on start menu, all programs, accessories, command prompt. A black and white old school screen will appear. Type the word 'netstat' and hit enter. then a whole bunch of garbage will appear: how to find which server you are on-untitled.png i have circled in yellow the kind of thing you'e looking through all that garbage to find, and i circled my server number (the digits before the colon : )

hope this helps.