Generic top-level domain

A Generic Top Level Domain (gTLD) is an internet extension with three or more characters. It is one of the categories of the top level domain(TLD) in the Domain Name System (DNS) maintained by the Internet Assigned Numbers Authority. There are 21 gTLDs in the root zone of the internet and they are categorized as:

• generic (.com,.info, .net, .org) which can be used for general purposes;
• sponsored, (.aero, .asia, .cat, .coop, .edu, .gov, .int, .jobs, .mil, .mobi, .tel and .travel) which can only be used by entities engaged within the specific industry;
• generic restricted (.biz, .name, .pro) which can be use only for their specified purposes and
• infrastructure(.arpa) is exclusively used to support operationally-critical infrastructural identifier spaces and it is operated by IANA.

The gTLDs are managed and operated by their sponsor organizations and or registry operators that were approved by the Internet Corporation for Assigned Names and Numbers.

Background

In 1984, Jon Postel and Joyce Reynolds published RFC 920 which proposed the introduction of top level domain names (TLDs) in the root zone of the internet. RFC 920 also described the categories and general purposes of the initial TLDs which include: .arpa, (temporary and intended for the transition from ARPA to Internet) .gov (government) .edu, (education) .com, (commercial) .mil (military) .org (organization) and the two-letter code (alpha-2) of the ISO-3166-1 list which represents the names of countries. On January 1985, the initial TLDs including .net were implemented in the root zone of the internet. The .gov and .mil gTLDs were restricted for the United States government and military use only while .edu, .com, .org and .net are open for registration. In 1988, the .int was introduced by IANA for international organizations established by treaties.

The original TLDs were managed and administered by the Network Information Center, the first assigned registrar responsible in hosting and registering the domain names. NIC was operated by SRI International.

In 1994, Postel released RFC 1591 which explained the entire structure of the DNS and specified the original TLDs (.com, .edu, .gov .mil, .net, .org and .int) are categorized as generic top level domains (gTLDs) and the two-letter country codes from ISO-3166 list. It was mentioned in the RFC that introduction of new TLDs will be unlikely.

On July 1, 1997, President Bill Clinton instructed the Department of Commerce to improve the operations of the internet by transferring the technical management of the DNS to a private organization that will be responsible in increasing competition and encouraging international participation. The directive was part of the Clinton Administration's Framework for Global Electronic Commerce. On July 2, a Request For Comment (RFC) was released by the National Telecommunication Information Administration (NTIA) to the public to submit their comments and recommendations on the government plan. The NTIA received 430 comments from the internet community. On January 30, 1998, the Green Paper was released under which, majority of the internet community expressed their dissatisfaction of the management of the DNS and recommended the creation of new private organization that to handle the technical management of the DNS as well as the creation of new gTLDs. Based on the Green Paper, the new corporation should maintain stability, competition, private bottom-up coordination, and representation as the guiding principles for the new corporation.

By April of 1998, the White Paper was released by the Department of Commerce which calls for the creation of a new independent private non profit corporation to takeover the technical management of the DNS from the U.S. government. Subsequently, the Internet Corporation for Assigned Named and Numbers was created by the internet community on October 1998.

Internet Assigned Numbers Authority

Request For Comments

International Standards Organization