A list of Yahoo users may be found in the Yahoo member directory. It can be searched using a person’s name or the data found in their Yahoo user profile.
Users’ first and last names are required to be included in their Yahoo profiles, but are only visible to individuals with whom they have established a connection through Yahoo Messenger or Yahoo Connections.
Yahoo customers have the option of expanding their profiles. Every time a gender, location, or age is added, it becomes public. The same is true for any profile image. Unless a person chooses to make certain information public, the remaining information on their profile is only visible to other Yahoo users they are connected to.