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 | This article needs to be updated. (May 2021) |
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] IANA also oversees the approval process for new proposed top-level domains for ICANN. As of April 2021[update], their root domain contains 1502 top-level domains.[2][3] As of March 2021[update], the IANA root database includes 1589 TLDs. That also includes 68 that are not assigned (revoked), 8 that are retired and 11 test domains.[1] Those are not represented in IANA's listing[2] and are not in root.zone file (root.zone file also includes one root domain).[4]
Types
IANA distinguishes the following groups of top-level domains:[5]
- infrastructure top-level domain (ARPA)
- generic top-level domains (gTLD)
- generic-restricted top-level domains (grTLD)
- sponsored top-level domains (sTLD)
- country code top-level domains (ccTLD)
- test top-level domains (tTLD)
Original top-level domains
Seven generic top-level domains were created early in the development of the Internet, and predate the creation of ICANN in 1998.
- Name: DNS names
- Entity: intended use
- Administrator: managers
- Notes: general remarks
- IDN: support for internationalized domain names (IDN)
- DNSSEC: presence of DS records for Domain Name System Security Extensions
| Name | Entity | Administrator[6] | Notes | IDN | DNSSEC | SLD | IPv6 |
|---|---|---|---|---|---|---|---|
| .com | commercial | Verisign | This is an open TLD; any person or entity is permitted to register. Though originally intended for use by for-profit business entities, for a number of reasons it became the main TLD for domain names and is currently used by all types of entities including nonprofits, schools, and private individuals. Domain name registrations may be successfully challenged if the holder cannot prove an outside relation justifying reservation of the name,[7] to prevent "squatting". It was originally administered by the United States Department of Defense. | Yes | Yes | Yes | Yes |
| .org | organization | Public Interest Registry | This is an open TLD; any person or entity is permitted to register. Originally created as a miscellaneous category as stated in RFC 920 (October 1984) "...any other domains meeting the second level requirements," and clarified in RFC 1591 (March 1994), "This domain is intended as the miscellaneous TLD for organizations that didn't fit anywhere else. Some non-government organizations may fit here."[8][9] While mainly non-profits have used this domain, it was never restricted from miscellaneous use. | Yes | Yes | Yes | Yes |
| .net | network | Verisign | Zdroj:https://en.wikipedia.org?pojem=.kids