Domain Name System/Service (DNS) (2)

Guess where the information come from

2 letters : by country

au	AUSTRALIA	hk	HONG KONG	ca	CANADA
at	AUSTRIA	jp	JAPAN	cn	CHINA
be	BELGIUM	uk	UNITED KINGDOM	fr	FRANCE
bj	BENIN	us	UNITED STATES	de	GERMANY

3 or more letters : Top Level Name by type

Often used as a second level after the country domain

com	Usually a company or other commercial institution or organization
edu	An educational institution (eg ANU)
gov	United States Government
int	Internationale Organisation (Otan)
mil	United States Military
net	Network related activities
org	intended to serve the noncommercial community, NGO (Unesco)

These un-sponsored top-level domains are open and unrestricted. Traditionally, however, most names are intended or reserved for specific use, as listed below. Please contact your registrar for more information or visit the Registry websites listed below.

• The .biz domain, operated by NeuLevel, Inc., is restricted to businesses.
• The .com domain, operated by VeriSign Global Registry Services, is a generic top-level domain originally intended for commercial businesses around the world.
• The .info domain, operated by Afilias Limited, is an unrestricted domain for websites containing information about you, your organization, your products or any other information you'd like to make available to a global audience.
• The .name domain, operated by Global Name Registry, is reserved for individuals.
• The .net domain, operated by VeriSign Global Registry Services, is a generic top-level domain used by many types of organizations and individuals globally; it was historically intended for and is still commonly used by Internet service providers.
• The .org domain, operated by Public Interest Registry, is unrestricted, but was intended to serve the noncommercial community.
• The .pro domain, operated by RegistryPro, is restricted to certified professionals and related entities.

The .aero, .coop, and .museum TLDs are sponsored TLDs and are designed for use within a specified community. Registration restrictions for these TLDs have been developed by the sponsor with input from the community.

• The .aero domain, sponsored by Société Internationale de Télécommunication Aéronautiques (SITA), is exclusively reserved for the aviation community.
• The .coop domain, sponsored by DotCooperation LLC, is restricted to use by bona fide cooperatives and cooperative service organizations that ascribe to the Cooperative Principles of the ICA, such as member ownership and control.
• The .museum domain, sponsored by the Museum Domain Management Association (MuseDoma), was developed exclusively for the museum community.

Source : http://www.iana.org/gtld/gtld.htm