The extension at the end of any URL provides clues about what kind of site it is. While most for-profit websites feature the .com extension, other websites include extensions that denote that they have other purposes.
One of the most common domain extensions found on the Internet is .edu. While .edu domains were once reserved for four-year colleges and universities, community colleges are now also eligible to receive .edu names.
Another common extension is .gov. A .gov domain signifies that the website associated with it is an official site of United States federal, state or local government. Some examples of .gov websites include IRS.gov, Whitehouse.gov, Senate.gov and Florida.gov.
Domains ending in .net or .org are unrestricted, meaning that any group or individual may claim one of these domains. Often nonprofit organizations choose to use .org extensions. Some examples include DoSomething.org, FactCheck.org and Change.org.
When a website is associated with a specific country, website administrators may choose to register a domain that signifies that the site should be associated with that country. For example, a website in Russia may have the .ru extension, a website in Argentina may have the .ar extension and a website in Spain may have the .es extension.