The domain name .com is a top-level domain (TLD) in the Domain Name System (DNS) of the Internet. Added in 1985, its name is derived from the word commercial, indicating its original intended purpose for domains registered by commercial organizations. Later, the domain opened for general purposes.
.us is the Internet country code top-level domain (ccTLD) for the United States. It was established in early 1985. Registrants of .us domains must be U.S. citizens, residents, or organizations, or a foreign entity with a presence in the United States. Most registrants in the U.S. have registered for .com, .net, .org and other gTLDs, instead of .us, which has primarily been used by state and local governments, even though private entities may also register .us domains.
.ca is the Internet country code top-level domain (ccTLD) for Canada. The domain name registry that operates it is the Canadian Internet Registration Authority (CIRA).
.uk is the Internet country code top-level domain (ccTLD) for the United Kingdom. It was first registered in July 1985, seven months after the original generic top-level domains such as .com and the first country code after .us.
.cn is the country code top-level domain (ccTLD) for the People's Republic of China introduced on 28 November 1990. Domain name administration in mainland China is managed through a branch of the Ministry of Industry and Information. The registry is maintained by China Internet Network Information Center (CNNIC). Entities connected to Hong Kong, Macau, and Taiwan often use .hk, .mo, .tw respectively, despite their corresponding second-level domains under .cn available for those regions. The Chinese alphabet internationalized country code is .中国.
.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.
.il is the Internet country code top-level domain (ccTLD) of Israel. It is administered by the Israel Internet Association and managed by NIC - ISRAEL, which hosts the DNS root server and manages the Israeli Internet Exchange, that supports IPv4 and IPv6.
.sg is the Internet country code top-level domain (ccTLD) for Singapore. It was first registered in September 1988. It is administered by the Singapore Network Information Centre. Registrations are processed via accredited registrars.
.co is the Internet country code top-level domain (ccTLD) assigned to Colombia.
.et is the country code top-level domain (ccTLD) for Ethiopia. Registrars offer second- and third-level domains.
.zm is the Internet country code top-level domain (ccTLD) for Zambia. Registrants of .zm domains must "have a presence in Zambia".
.gr is the country code top-level domain (ccTLD) for Greece. Registrations are processed via accredited registrars and domain names in Greek characters may also be registered.
.gt is the Internet country code top-level domain (ccTLD) for Guatemala. As from 29 May 2012, .gt second level registrations are available.
.so is the internet country code top-level domain (ccTLD) for Somalia. After a long absence, the .so domain was officially relaunched on November 1, 2010, by .SO Registry, which is regulated by the nation's Ministry of Posts and Telecommunications. It was launched through various accredited registrars around the world.
.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.
.mu is the Internet country code top-level domain (ccTLD) for Mauritius. It is administered by the Mauritius Network Information Centre and registrations are processed via accredited registrars. Some registrars market it as the .music and .museum TLD.
.na is the Internet country code top-level domain (ccTLD) for Namibia corresponding to the two letter code from the ISO-3166 standard.
.sc is the Internet country code top-level domain (ccTLD) for Seychelles. The TLD was marketed to businesses in Scotland and the U.S. state of South Carolina, however, the domains are subject to Seychelles registry rules. While SCregistrars, a company who marketed .sc domains to a target audience of Scottish sites, has since closed down the .sc extension remains available through the Afilias Global platform via various well-known registrars internationally for direct registration at second-level.
In the Domain Name System (DNS) hierarchy, a second-level domain is a domain that is directly below a top-level domain (TLD). For example, in example.com, example is the second-level domain of the .com TLD.
.rs is the Internet country code top-level domain (ccTLD) for Serbia. The domain name registry that operates it is the Serbian National Internet Domain Registry (RNIDS). The letters rs stand for Republika Srbija/Република Србија.
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