top-level domain

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top-level domain

The last and most significant component of an Internet fully qualified domain name, the part after the last ".". For example, host is in top-level domain "uk" (for United Kingdom).

Every other country has its own top-level domain, including ".us" for the U.S.A. Within the .us domain, there are subdomains for the fifty states, each generally with a name identical to the state's postal abbreviation. These are rarely used however. Within the .uk domain, there is a subdomain for academic sites and a domain for commercial ones. Other top-level domains may be divided up in similar ways.

In the US and some other countries, the following top-level domains are used much more widely than the country code:

.com - commercial bodies .edu - educational institutions .gov - U. S. government .mil - U. S. armed services .net - network operators .org - other organisations

Since the rapid commercialisation of the Internet in the 1990s the ".com" domain has become particularly heavily populated with every company trying to register its company name as a subdomain of .com, e.g. "" so as to make it easy for customers to guess or remember the URL of the comany's home page.

United Nations entities use the domain names of the countries where they are located. The UN headquarters facility in New York City, for example, is

Several new top-level domains are about to be added (Oct 1997): .nom - individual people .rec - recreational organisations .firm - businesses such as law, accounting, engineering .store - commercial retail companies .ent - entertainment facilities and organisations
References in periodicals archive ?
We look forward to working with Minds + Machines to help new gTLD applicants with the technical implementation of their new top-level domains, and are grateful that they recognize NCC Group's expertise and innovation in providing registry data escrow services.
Now's the perfect time for brands to consider a new Top-Level Domain as part of their long-term digital marketing strategy," he continued.
Applicants for new generic top-level domains will have the option of designating their proposed generic top-level domain as "community-based.
In addition to highly popular top-level domains such as dotFM, Minds + Machines provides capacity-building grants through CoCCA to emerging country-code registries - providing equipment, training and ongoing guidance as well as free implementation of the Espresso CC platform.
L) today announced that it has completed a merger with Minds + Machines, a leading registry services provider for web-based top-level domains.
The close cooperation between EPAG and Minds + Machines will provide German customers with everything they need to successfully apply for a new top-level domain.
These services allow top-level domain operators the flexibility to augment their infrastructure by leveraging TLDDNS.
CA country code top-level domain registries are protecting their customers' data; and gain insight from other industries' data protection models, including TELUS.
ORG, which was created in 1984, has grown to be the third largest generic top-level domain and the fifth largest domain when including country code top-level domains.
UltraDNS(TM) Corporation, the leading provider of DNS infrastructure for the Top-Level Domain (TLD) community, today announced that it has been selected to provide global DNS services for Hostmaster Ltd.
VeriSign operates the largest top-level domain registries in the world, and this expertise will ensure the smooth and successful introduction of .
Now, for the last time in many years to come, your most desired name is available on a global top-level domain.