useful information

Generic Top Level Domains with WHOIS Servers

Generic top-level domains (gTLDs) are one of the categories of top-level domains (TLDs) maintained by the Internet Assigned Numbers Authority (IANA) for use in the Domain Name System of the Internet. A top-level domain is the last level of every fully qualified domain name. They are called generic for historic reasons; initially, they were contrasted with country-specific TLDs in RFC 920.

The core group of generic top-level domains consists of the com, info, net, and org domains. In addition, the domains name, and pro are also considered generic; however, these are designated as restricted, because registrations within them require proof of eligibility within the guidelines set for each.

Historically, the group of generic top-level domains included domains, created in the early development of the domain name system, that are now sponsored by designated agencies or organizations and are restricted to specific types of registrants. Thus, domains edu, gov, int, and mil are now considered sponsored top-level domains, much like the themed top-level domains (e.g., jobs). The entire group of domains that do not have a geographic or country designation (see country-code top-level domain) is still often referred to by the term generic TLDs.

The number of gTLD as of March 2018 exceeds 1,200 domains - we have included a list of the original 21 gTLDs below, for an up-to-date list of all available gTLDs, we suggest that you consult the IANA website at

.AERO Reserved for members of the air-transport industry
.ARPA Reserved exclusively to support operationally-critical infrastructural identifier spaces as advised by the Internet Architecture Board
.ASIA Restricted to the Pan-Asia and Asia Pacific community
.BIZ Restricted for Business
.CAT Reserved for the Catalan linguistic and cultural community
.COM Generic top-level domain
.COOP Reserved for cooperative associations
.EDU Reserved for post-secondary institutions accredited by an agency on the U.S. Department of Education's list of Nationally Recognized Accrediting Agencies
.GOV Reserved exclusively for the United States Government
.INFO Generic top-level domain
.INT Used only for reg istering organizations established by international treaties between governments
.JOBS Reserved for human resource managers
.MIL Reserved exclusively for the United States Military  
.MOBI Reserved for consumers and providers of mobile products and services
.MUSEUM Reserved for museums
.NAME Reserved for individuals
.NET Generic top-level domain
.ORG Generic top-level domain
.PRO Restricted to credentialed professionals and related entities
.TEL Reserved for businesses and individuals to publish their contact data
.TRAVEL Reserved for entities whose primary area of activity is in the travel industry