A domain name is a Web address, such as coolexample.com, that is linked to an IP address (which represents a physical point on the Internet).

When someone types a domain name into a Web browser, the requested Web page displays.

What is a domain name?

A domain name is a Web address, such as coolexample.com, that is linked to an IP address (which represents a physical point on the Internet). When someone types a domain name into a Web browser, the requested Web page displays.

A domain name consists of a top-level and a second-level domain. A top-level domain (TLD), or domain extension, is the part of the domain name located to the right of the dot (coolexample.com). The most common domain extensions are .COM, .NET, and .ORG. Some other popular domain extensions are .BIZ, .INFO, .NAME, and .WS. These common extensions have certain guidelines, but are usually available to any registrant, anywhere in the world.

Restricted Names

There are also restricted top-level domains (rTLDs), like .AERO, .BIZ, .EDU, .MIL, .MUSEUM, .NAME, and .PRO that require registrants to represent a certain type of entity or to belong to a certain community. For example, the .NAME domain extension is reserved for individuals, while .EDU is reserved for educational entities.

Country-code TLDs (ccTLDs) are for Web sites and registrants of a particular geographic location, such as .BZ (Belize), .CA (Canada), .DK (Denmark), .EC (Ecuador), .IE (Republic of Ireland), .UK (United Kingdom), .US (United States), and .NZ (New Zealand).

The part of the domain name located to the left of the dot (coolexample.com) is called the second-level domain (SLD) name.

What is a second level domain name?

The second-level domain name is the "readable" part of the address and refers to the organization or entity behind the Internet address. Second-level domain names must be unique on the Internet and registered with an Internet Corporation for Assigned Names and Numbers (ICANN)-accredited registrar.

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