Creating third-level domains

Domain names are composed of at least two levels, a top-level domain and a second-level domain. The top-level domain, also referred to as TLD, is the suffix or extension attached to Internet domain names. There are a limited number of predefined TLDs, such as .com, .net and .org.

A second-level domain (SLD) is the portion of a Uniform Resource Locator (URL) that identifies the specific and unique administrative owner associated with an Internet Protocol address (IP address). The second-level domain name includes the top-level domain name. For example, "" is a second-level domain, as it includes the domain name "NetNation" and the top-level domain "com."

If you need to further distinguish your second-level domain name, you can use a third-level domain name, such as "" Typically a third-level domain name is used to refer to different servers within different departments of a company.

Third-level domains can be set up as:

You can create a third-level domain using one of two different methods:

To create a third-level domain:

  1. In AccountManager, click Domain Name to display the Domain Name Management page.
  2. Click Edit DNS/MX Record. Information about your current domain displays.
  3. Carefully review the information on this page, including the schedule of costs, and then scroll to the bottom of the page. Select Custom and then click Continue.
  4. When the DNS Record Action page appears, locate the Customization of DNS Records section.
  5. Type the third-level domain name you want to create. You can create up to four.
  6. For each, select either CNAME (to point to a domain name) or A (to point to an IP address).
  7. For each, enter the domain name or IP address.
  8. When you are finished, click Submit DNS Change Request.
  9. Review the summary of changes, including any additional charges you may incur, and then click Submit.

NetNation processes your request immediately. You should allow 48 to 72 hours for the propagation period.