In the Internet, a domain name is a string that identifies a realm of administrative autonomy, authority or control. Domain names are often used to identify services provided through the Internet, such as websites, email services and more. As of 2017, 330.6 million domain names had been registered. Domain names are used in various networking contexts and for application-specific naming and addressing purposes. In general, a domain name identifies a network domain or an Internet Protocol (IP) resource, such as a personal computer used to access the Internet, or a server computer.
A domain name registry is a database of all domain names and the associated registrant information in the top level domains of the Domain Name System (DNS) of the Internet that enables third party entities to request administrative control of a domain name. Most registries operate on the top-level and second-level of the DNS.
The domain name .org is a generic top-level domain (gTLD) of the Domain Name System (DNS) used on the Internet. The name is truncated from 'organization'. It was one of the original domains established in 1985, and has been operated by the Public Interest Registry since 2003. The domain was originally "intended as the miscellaneous TLD for organizations that didn't fit anywhere else." It is commonly used by non-profit organizations, open-source projects, and communities, but is an open domain that can be used by anyone. The number of registered domains in .org has increased from fewer than one million in the 1990s, to ten million in 2012, and held steady between ten and eleven million since then.
.eu is the country code top-level domain (ccTLD) for the European Union (EU). Launched on 7 December 2005, the domain is available for any person, company or organization based in the European Union. This was extended to the European Economic Area in 2014, after the regulation was incorporated into the EEA Agreement, and hence is also available for any person, company or organization based in Iceland, Liechtenstein and Norway. The TLD is administered by EURid, a consortium originally consisting of the national ccTLD registry operators of Belgium, Sweden, and Italy, joined later by the national registry operator of the Czech Republic. Trademark owners were able to submit registrations through a sunrise period, in an effort to prevent cybersquatting. Full registration started on 7 April 2006.
.coop is a sponsored top-level domain (sTLD) in the Domain Name System of the Internet. It is intended for the use of cooperatives, their wholly owned subsidiaries, and other organizations that exist to promote or support cooperatives.
A domain name registrar is a company that manages the reservation of Internet domain names. A domain name registrar must be accredited by a generic top-level domain (gTLD) registry or a country code top-level domain (ccTLD) registry. A registrar operates in accordance with the guidelines of the designated domain name registries.
.ee is the internet country code top-level domain (ccTLD) of Estonia, operated by the Estonian Internet Foundation.
.jp is the Internet country code top-level domain (ccTLD) for Japan. It was established in 1986 and is administered by the Japan Registry Services.
.ws is the Internet country code top-level domain (ccTLD) for Samoa. It is administered by SamoaNIC, for the Ministry of Foreign Affairs of the Government of Samoa.
.co is the Internet country code top-level domain (ccTLD) assigned to Colombia.
.cr is the country code top-level domain (ccTLD) of Costa Rica.
.tw is the Internet country code top-level domain (ccTLD) for Taiwan. The domain name is based on the ISO 3166-1 alpha-2 country code TW. The registry is maintained by the Taiwan Network Information Center (TWNIC), a Taiwanese non-profit organization appointed by the National Communications Commission (NCC) and the Ministry of Transportation and Communication. Since 1 March 2001, TWNIC has stopped allowing itself to sign up new domain names directly, instead allowing new registration through its contracted reseller registrars. As of May 2023, there are 17 registrars.
.ug is the Internet country code top-level domain (ccTLD) for Uganda.
.lc is the Internet country code top-level domain (ccTLD) for Saint Lucia, sponsored by the University of Puerto Rico and created on September 3, 1991. The registry is operated by Afilias and markets towards companies structured as LCs, LLCs or PLCs due to the possibility of a domain hack, such as CompanyName.L.LC and supposedly better names.
.ly is the Internet country code top-level domain (ccTLD) for Libya.
.ma is the Internet country code top-level domain (ccTLD) for Morocco. A local registrar with a local Moroccan company as administrative contact is needed to register a .ma or .co.ma domain name. Further restrictions are imposed on the registering of other second-level domains.
.tz is the Internet country code top-level domain for Tanzania. Through a consultative process, Tanzania Network information Centre (tzNIC), a not-for-profit company was established and registered to administer and manage the operations of the Tanzania country code top-level domain. tzNIC is a limited company with two founding members – the Tanzania Communication Regulatory Authority and the Tanzania Internet Service Provider Association.
Afilias, Inc. was a US corporation that was the registry operator of the .info, .mobi and .pro top-level domain, service provider for registry operators of .org, .ngo, .lgbt, .asia, .aero, and a provider of domain name registry services for countries around the world, including .MN (Mongolia), .AG, .BM (Bermuda), .BZ (Belize), .AC, .GI (Gibraltar), .IO .ME (Montenegro), .PR, .SC, .SH, .VC, and .AU (Australia). Afilias also provided ancillary support to other domains, including .SG (Singapore), .LA (Laos), and .HN (Honduras). It was merged into Identity Digital in 2022.
INRegistry is the organisation responsible for the .in TLD and the native language internationalised domain name TLDs for the country. It was appointed by the government of India, and operates under the authority National Internet Exchange of India (NIXI).
The Coordination Center for TLD .RU/.РФ — is the administrator of Top Level National Domains .RU and .PФ. It serves as the national registry.
Seychelles 
