The Domain Name System (DNS) is a hierarchical and distributed naming system for computers, services, and other resources in the Internet or other Internet Protocol (IP) networks. It associates various information with domain names assigned to each of the associated entities. Most prominently, it translates readily memorized domain names to the numerical IP addresses needed for locating and identifying computer services and devices with the underlying network protocols. The Domain Name System has been an essential component of the functionality of the Internet since 1985.
APNIC is the regional Internet address registry (RIR) for the Asia-Pacific region. It is one of the world's five RIRs and is part of the Number Resource Organization (NRO).
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 com is a top-level domain (TLD) in the Domain Name System (DNS) of the Internet. Created in the first group of Internet domains at the beginning of 1985, its name is derived from the word commercial, indicating its original intended purpose for subdomains registered by commercial organizations. Later, the domain opened for general purposes.
The domain name gov is a sponsored top-level domain (sTLD) in the Domain Name System of the Internet. The name is derived from the word government, indicating its restricted use by government entities. The TLD is administered by the Cybersecurity and Infrastructure Security Agency (CISA), a component of the United States Department of Homeland Security.
.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 foreign entities with a presence in the United States or any territory of 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. The domain is managed by Registry Services, LLC, a domain name registry, on behalf of the United States Department of Commerce.
.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.
.je is the country code top-level domain for Jersey. The domain is administered by Island Networks, who also administer the .gg domain for neighbouring territory Guernsey. In 2003, a Google Search website was made available for Jersey, which uses the .je domain.
.tp was the listed Internet country code top-level domain (ccTLD) for East Timor. The letters refer to Timor Português or Portuguese Timor, the name of the present independent nation when it was an overseas territory of Portugal. The domain .tp was officially launched in December 1997 by connect.ie, an internet service provider based in Dublin, Ireland, in cooperation with the East Timorese authorities in absentia, while East Timor was under Indonesian authority.
.zm is the Internet country code top-level domain (ccTLD) for Zambia. Registrants of .zm domains must "have a presence in Zambia".
.ir is the Internet country code top-level domain (ccTLD) for Iran. It is managed by the Institute for Research in Fundamental Sciences.
.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.
.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.
.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.
.st is the Internet country code top-level domain (ccTLD) for São Tomé and Príncipe. The code is marketed worldwide as an abbreviation for various entities.
.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.
WHOIS is a query and response protocol that is used for querying databases that store an Internet resource's registered users or assignees. These resources include domain names, IP address blocks and autonomous systems, but it is also used for a wider range of other information. The protocol stores and delivers database content in a human-readable format. The current iteration of the WHOIS protocol was drafted by the Internet Society, and is documented in RFC 3912.
The Registration Data Access Protocol (RDAP) is a computer network communications protocol standardized by a working group at the Internet Engineering Task Force in 2015, after experimental developments and thorough discussions. It is a successor to the WHOIS protocol, used to look up relevant registration data from such Internet resources as domain names, IP addresses, and autonomous system numbers.
Northern Mariana Islands