Although many of these are businesses, they can also represent single individuals. Just because information is on a college or university site should not lead you to give it added credibility. A famous case from the Midwest is a professor's Web page on a Big Ten university's Web site, which claimed the Holocaust never happened. Keep that in mind when evaluating what you've found on that site. These domains, particularly if an Internet Service Provider, often have Web pages for their subscribers.
Name is their user name on that network.
Just because a Web page belongs to an individual does not mean it is not reliable. However, you need to consider the credibility of such a site just like you would a commercial site. For government information, go to that agency. If you find a site particularly useful, bookmark it in your Web browser so you can quickly return. A search engine actively searches the Web for sites, and indexes the pages it finds.