Ever wanted to find out someone’s IP address online? Of course you have! Tracing “calls” on the Internet is much more complicated than on the plain old telephone network. This expose` includes a history of traditional techniques used to discover the IP address of a target user in: chat rooms, forums and other types of social networking sites. Attention will be centered around a fundamental weakness in the IRC protocol that allows client IP addresses to be determined. Proof-of-concept samples targetting multiple IRC daemons will be released. Prizes will be awarded to the most interesting submissions for an online edition of ‘Spot The Fed.’