The Structure of a Domain Name

A domain name always has two or more parts separated by dots and typically consists of some form of an organization's name and a three letter or more suffix. For example, the domain name for IBM is "ibm.com"; the United Nations is "un.org."

The domain name suffix is known as a generic top-level domain (gTLD) and it describes the type of organization. However in the last few years, the lines have blurred somewhat between these categories. Currently in use of these gTLDs:
aero--For the air-transport industry

.biz--Reserved for businesses

.com--For businesses, commercial enterprises, or online services like America Online. Most companies use this extension.

.coop--Reserved for cooperatives

.edu--For educational institutions and universities

.gov--Reserved for United States government agencies

.info--For all uses

.int--For organizations established by international treaties

.mil--For the United States military

.museum--For use by museums

.name--For use by individuals

.net--For networks; usually reserved for organizations such as Internet service providers

.org--For non-commercial organizations

.pro--For use by professionals, such as attorneys and physicians

ICANN, the Internet Corporation for Assigned Names and Numbers, manages the Domain Name System. For the latest news, visit the ICANN website. The more popular TLDs (.com, .net, .org, .biz, .info, .name) are available to the general public for registration of domain names.

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