• .COM - to be used for commercial and personal sites
• .NET - recommended for companies involved in Internet infrastructure
• .ORG - recommended for not-for-profit organizations
• Use only letters, numbers, or hyphen ("-")
• Cannot begin or end with a hyphen
• Must have less than 63* characters, not including .COM, .NET and .ORG

* .com, .net and .org domain names exceeding a total of 26 characters are supported by most web browsers. However, certain web browsers, email programs and other Internet related applications may not support domain names over 26 characters.

• .INFO - to be used for both commercial and personal sites
• Use only letters, numbers, or hyphen ("-")
• Cannot begin or end with a hyphen
• Must have at least 3 characters and less than 63 characters, not including .INFO

• .BIZ - sites restricted to commercial and bona fide business purposes
• Use only letters, numbers, or hyphen ("-")
• Cannot begin or end with a hyphen
• Cannot have two hyphens in a row
• Must have at least 3 characters and less than 63 characters, not including .BIZ

• .NAME - to be used for personal sites
• Must be composed of a first and last name (yourname1.yourname2.name)
• First name (yourname1 in above example) must have at least 1 character and no more than 63 characters
• Second name (yourname2 in above example) must have at least 3 characters and no more than 63 characters
• Use only letters, numbers or hyphen ("-")
• Cannot begin or end with a hyphen

• .US - to be used by U.S. citizens, residents, corporations and other U.S. organizations and organizations with a presence within the United States
• Use only letters, numbers, or hyphen ("-")
• Domain names cannot begin or end with a hyphen
• Domain names must be longer than 2 characters and cannot exceed 63 characters (this does not include the extension)