This is to easy:
1. First turn connection logging on. To do this while in msn go to tools > options > connection > advanced settings, and then of course click the check box under connection logging.
2. Attempt to send a file to your target, doesn't matter if they decline it will still work.
3. Then go to My documents > received files > MsnMsgr (text file) search (ctrl+f) “Connecttoip” and you will your selected items. Click the find next button until you find the IP address..
Getting it through CMD:
1. Open CMD
2. Type netstat and hit enter
3. Connect to the person (Can be done with by sending them a file, webcam, or voice. doesn't matter which
4. Type netstat again in command prompt, find the new ip.
Now can you guys stop talking arse about this, I mean come on! CF is becoming stupider and stupider having someones IP means nothing, hey good work you now now where there ISP is.