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This list of Internet top-level domains (TLD) contains top-level domains, which are those domains in the DNS root zone of the Domain Name System of the Internet. A list of the top-level domains by the Internet Assigned Numbers Authority (IANA) is maintained at the Root Zone Database. [ 1 ]
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.
An internationalized country code top-level domain (IDN ccTLD) is a top-level domain with a specially encoded domain name that is displayed in an end user application, such as a web browser, in its native language script or a non-alphabetic writing system, such as Latin script (.us, .uk and .br), Indic script (. भारत) and Korean script (.
A different top-level domain: (i.e. .com instead of .org) An abuse of the Country Code Top-Level Domain (ccTLD) (.cm, .co, or .om instead of .com) IDN homograph attack. This type of attack depends on registering a domain name that is similar to the 'target' domain, differing from it only because its spelling includes one or more characters that ...
Dot-separated fully qualified domain names are the primarily used form for human-readable representations of a domain name. Dot-separated domain names are not used in the internal representation of labels in a DNS message [7] but are used to reference domains in some TXT records and can appear in resolver configurations, system hosts files, and URLs.
Universal Acceptance (UA) is a term coined by Ram Mohan to represent the principle that every top-level domain (TLD) should function within all applications regardless of script, number of characters, or how new it is. [1] Historically, there were a limited number of TLDs available in strings of two or three Latin-script characters.
Single-letter second-level domains are domains in which the second-level domain of the domain name consists of only one letter, such as x.com.In 1993, the Internet Assigned Numbers Authority (IANA) explicitly reserved all single-letter and single-digit second-level domains under the top-level domains com, net, and org, and grandfathered those that had already been assigned.
The internationalized TLDs .中国 (.xn--fiqs8s or .xn--fiqz9s for "China") and .გე (.xn--node for the Georgian letters for the Georgian country code "GE") also have wildcard A records. The *.中国 wildcard resolves to ibaidu.com (flagged by Chrome as unsafe), and the *.გე wildcard resolves to a website of the .ge TLD.