Generic top-level domains (TLD)
Name Entity .biz business Notes This is an open TLD; any person or entity is permitted to register; however, registrations may be challenged later if they are not held by commercial entities in accordance with the domain's charter. This TLD was created to provide relief for the wildly popular .com TLD. This is an open TLD; any person or entity is permitted to register. Though originally intended for use by for-profit business entities, for a number of reasons it became the "main" TLD for domain names and is currently used by all types of entities including nonprofits, schools and private individuals. Domain name registrations may be challenged if the holder cannot prove an outside relation justifying reservation of the name, to prevent "squatting". The .int TLD is strictly limited to organizations, offices, and programs which are endorsed by a treaty between two or more nations. However, there are a few grandfathered domain names that do not meet these criteria. This is an open TLD; any person or entity is permitted to register. Originally intended for use by domains pointing to a distributed network of computers, or "umbrella" sites that act as the portal to a set of smaller websites. This is an open TLD; any person or entity is permitted to register. Originally intended for use by non-profit organizations, and still primarily used by some.
international organizations network
USA top-level domains
Name Entity .edu educational Notes The .edu TLD is limited to specific educational institutions such as, but not limited to, primary schools, middle schools, secondary schools, colleges, and universities. In the US, its usability was limited in 2001 to post-secondary institutions accredited by an agency on the list of nationally recognized accrediting agencies maintained by the United States Department of Education. This domain is therefore almost exclusively used by US colleges and universities. Some institutions that do not meet the current registration criteria have grandfathered domain names. governmental The .gov TLD is limited to governmental entities and agencies in the US. US military The .mil TLD is limited to use by the US military.
Country code top-level domains
name: DNS name of the country code top-level domain Entity: country, dependency, or region Explanation: explanation of the code when not self-evident from the English name of the country Notes: general remarks Entity Australia Canada Explanation Notes Includes Ashmore and Cartier Islands and Coral Sea Islands. ABN required. Subject to Canadian Presence Requirements.
Name .au .ca
Entity United Kingdom United States of America
Notes ISO 3166-1 code is gb, but .uk correctly correlates with the state of the United Kingdom of Great Britain and Northern Ireland. The use of .gb would exclude Northern Ireland Commonly used by US State and local governments instead of .gov TLD
1. ^ (November 17, 2009) Spanish-Portuguese specific characters (á, â, ã, à, é, ê, í, ó, ô, õ, ú, ü, ñ, ç) allowed, as approved by law 2. ^ in addition to ASCII, only Cyrillic letters from the Bulgarian language are accepted 3. ^ Currently not allowed, but some higher-learning institutions were grandfathered in. 4. ^ Since March 2004, see details 5. ^ 93 non-ASCII characters, see details 6. ^ (January 1, 2004), (æ, ø, å, ö, ä, ü, & é): see details 7. ^ Estonian domain names to incorporate diacritics (IDN) Starting from June 13, 2011  8. ^ Supported characters (latin, greek, cyrillic): see details 9. ^ (September 2005) Supported characters (latin): see details 10. ^ a b c d e f (6 December 2011) "Opening to Europe of the .fr, .wf, .re, .yt, .pm, and .tf TLDs".. Before restricted to residents of the corresponding French territory. 11. ^ a b c d e f Availability of IDN on the .fr, .yt, .pm, .wf, .tf, and .re TLDs 12. ^ ,  13. ^ .my Domain Registry 14. ^ (July 26, 2010) for Māori macrons ā, ē, ī, ō and ū. See details 15. ^ (8 December 2007): see details 16. ^ (11 September 2003): see details 17. ^ a b (11 September 2010) .tf DNSsec (17 September 2010) .yt DNSsec See ".tf and .yt DNSsec keys published in DNS root". 18. ^ (1 July 2005) for Portuguese characters 19. ^ (October 2003), for Swedish characters, summer 2007 also for Finnish, Meänkieli, Romani, Sami, and Yiddish: see details 20. ^ IDN Code Points Policy for the .SH Top Level Domain 21. ^ Since October 2010, see details 22. ^ (28 April 2008) see details 23. ^ IDN Code Points Policy for the .TM Top Level Domain 24. ^ (14 November 2006): see details 25. ^ Traditional Chinese characters: see details 26. ^ TRUNG TÂM INTERNET VIÊT NAM - Tên mien tieng viet