A top-level domain (TLD) is one of the domains at the highest level in the hierarchical Domain Name System of the Internet after the root domain. The top-level domain names are installed in the root zone of the name space. For all domains in lower levels, it is the last part of the domain name, that is, the last non empty label of a fully qualified domain name. For example, in the domain name www.example.com, the top-level domain is .com. Responsibility for management of most top-level domains is delegated to specific organizations by the ICANN, an Internet multi-stakeholder community, which operates the Internet Assigned Numbers Authority (IANA), and is in charge of maintaining the DNS root zone.
.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.
A country code top-level domain (ccTLD) is an Internet top-level domain generally used or reserved for a country, sovereign state, or dependent territory identified with a country code. All ASCII ccTLD identifiers are two letters long, and all two-letter top-level domains are ccTLDs.
.an was the Internet country code top-level domain (ccTLD) for the former Netherlands Antilles. It was administered by the University of the Netherlands Antilles. The domain was phased out after the Netherlands Antilles were dissolved in 2010. As of November 2010 the .an domain remained live with over 800 domains registered under .an, including secondary levels. On 31 July 2015, use of the domain was discontinued.
.ax is the Internet country code top-level domain (ccTLD) of Åland, Finland, introduced in 2006. Previously, most Åland websites were under the .aland.fi subdomain.
Western Sahara is a disputed territory, and as such it has no country code top-level domain (ccTLD). .eh is reserved for this purpose, and will be assigned if the Western Sahara conflict results in an agreement between the Sahrawi Arab Democratic Republic and Morocco. IANA has not designated a ccTLD manager for the .eh domain.
.cs was for several years the country code top-level domain (ccTLD) for Czechoslovakia. However, the country split into the Czech Republic and Slovakia in 1993, and the two new countries were soon assigned their own ccTLDs: .cz and .sk respectively. The use of .cs was gradually phased out, and the ccTLD was deleted some time around January 1995.
.su is an Internet country code top-level domain (ccTLD) that was designated for the Union of Soviet Socialist Republics (USSR) on 19 September 1990. Even though the Soviet Union itself was dissolved a mere 15 months later, the .su top-level domain remains in use today with over 100,000 .su domains as of February 2022. It is administered by the Russian Institute for Public Networks.
.il is the Internet country code top-level domain (ccTLD) of Israel, 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.
A sponsored top-level domain (sTLD) is one of the categories of top-level domains (TLDs) maintained by the Internet Assigned Numbers Authority (IANA) for use in the Domain Name System of the Internet, alongside country-code top-level domains (ccTLD) and generic top-level domains (gTLD).
.uz is the Internet country code top-level domain (ccTLD) for Uzbekistan. Registry services were formerly operated by Euracom GmBH, but were later redelegated to UZINFOCOM. Registrations are taken directly at the second level, but the former registry also advertised the availability of registrations at the third level beneath co.uz and com.uz, and some domain names under other second-level names such as org.uz also exist.
.gp is the country code top-level domain (ccTLD) for Guadeloupe. Pricing differs for Guadeloupians compared to other Internet users.
.gq is the country code top-level domain (ccTLD) for Equatorial Guinea. Freenom relaunched the TLD on October 1, 2014, and domains became available for free on January 1, 2015.
.ky is the Internet country code top-level domain (ccTLD) for the Cayman Islands. The code was chosen as other possible options had already been allocated. Registration was limited to residents and registered companies in the Cayman Islands with a local address, but this restriction was removed in September 2015. The Cayman Islands also has the international three-letter code CYM and has won a bid to be awarded the .cym domain in a future expansion of the top-level domain space.
.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.
.na is the Internet country code top-level domain (ccTLD) for Namibia corresponding to the two letter code from the ISO-3166 standard.
.pm is the country code top-level domain (ccTLD) for Saint Pierre and Miquelon. It is managed by AFNIC, with registration services opening on 6 December 2011.
.pw is the country code top-level domain for the Republic of Palau.
.tc is the Internet country code top-level domain (ccTLD) for Turks and Caicos Islands. Since T.C. also stands for Türkiye Cumhuriyeti, the domain is used by some Turkish sites as well. The .tc TLD was registered in January 1997.
.bq is designated—but not in use—as the Internet country code top-level domain (ccTLD) for Bonaire, Sint Eustatius and Saba following the assignment on December 15, 2010, by the ISO 3166 Maintenance Agency of BQ as the ISO 3166-1 alpha-2 to the area. This decision followed the dissolution of the Netherlands Antilles and new status of the Caribbean Netherlands as public bodies of the Netherlands on October 10, 2010.
Democratic Republic of the Congo 
