Editing Top-level domain (section)

==Types==
{{As of|2015|post=,}} IANA distinguishes the following groups of top-level domains:<ref>{{cite web |title=IANA root zone database |website=IANA.org |publisher=[[Internet Assigned Numbers Authority]] |url=https://www.iana.org/domains/root/db/ |access-date=2015-11-10}}</ref>
* [[#Infrastructure domain|Infrastructure top-level domain]] (ARPA): This group consists of one domain, the [[.arpa|Address and Routing Parameter Area]]. It is managed by IANA on behalf of the [[Internet Engineering Task Force]] for various purposes specified in the [[Request for Comments]] publications.
* [[Generic top-level domain]]s (gTLD): Top-level domains with three or more characters
* Generic restricted top-level domains (grTLD): These domains are managed under official ICANN-accredited registrars.
* [[Sponsored top-level domain]]s (sTLD): These domains are proposed and sponsored by private agencies or organizations that establish and enforce rules restricting the eligibility to use the TLD. Use is based on community theme concepts; these domains are managed under official ICANN accredited registrars.
* [[Country code top-level domain|country-code top-level domain]]s (ccTLD): Two-letter domains established for [[country|countries]] or [[List of dependent territories|territories]]. With some historical exceptions, the code for any territory is the same as its two-letter [[ISO 3166]] code.
** [[Internationalized country code top-level domain]]s (IDN ccTLD): ccTLDs in non-Latin character sets (e.g., Arabic, Cyrillic, Greek, Hebrew, or Chinese).
* [[.test|Test top-level domains]] (tTLD): These domains were installed under [[.test]] for testing purposes in the IDN development process; these domains are not present in the root zone.

Countries are designated in the Domain Name System by their [[ISO 3166-1 alpha-2|two-letter ISO country code]];<ref>''Codes for the Representation of Names of Countries'', ISO-3166, International Organization for Standardization. (May 1981)</ref> there are exceptions, however (e.g., [[.uk]]). This group of domains is, therefore, commonly known as [[country-code top-level domain]]s (ccTLD). Since 2009, countries with non–Latin-based scripts may apply for [[internationalized country code top-level domain]] names, which are displayed in end-user applications in their language-native script or alphabet, but use a [[Punycode]]-translated ASCII domain name in the Domain Name System.

Generic top-level domains (formerly ''categories'') initially consisted of [[.gov]], [[.edu]], [[.com]], [[.mil]], [[.org]], and [[.net]]. More generic TLDs have been added, such as [[.info]].

The authoritative [[list of Internet top-level domains|list of current TLDs]] in the root zone is published at the IANA website at [https://www.iana.org/domains/root/db/ https://www.iana.org/domains/root/db/].