Below these top-level domains in the DNS hierarchy are the second-level and third-level domain names that are typically open for reservation by end-users who wish to connect local area networks to the Internet, create other publicly accessible Internet resources or run web sites. The first-level set of domain names are the top-level domains (TLDs), including the generic top-level domains (gTLDs), such as the prominent domains com, info, net, edu, and org, and the country code top-level domains (ccTLDs). Domain names are organized in subordinate levels (subdomains) of the DNS root domain, which is nameless. Any name registered in the DNS is a domain name. 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.ĭomain names are formed by the rules and procedures of the Domain Name System (DNS). Domain names are used in various networking contexts and for application-specific naming and addressing purposes. As of 2017, 330.6 million domain names had been registered. Domain names are often used to identify services provided through the Internet, such as websites, email services and more. In the Internet, a domain name is a string that identifies a realm of administrative autonomy, authority or control. For other uses, see Domain (disambiguation). This article is about domain names in the Internet.
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