top-level domain

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Related to Tlds: gTLD

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 ?
The TLD is also designed so that the leading edge of the blade enters a recessed area.
As a result, the .app domain will be the first TLD to be enforced with security protocols and made available for general registration.
Much has changed in the two years since the last article featuring TLD expansion appeared.
In this study, we aimed to use the treatment planning system (TPS) calculation, thermoluminescent dosimeter (TLD) measurement, and Monte Carlo (MC) simulation to evaluate the characteristics of dosimetric distribution of the novel radioactive stents of different lengths — with different number as well as activities of [sup]125 I seeds –– and to provide a theoretical basis for dosimetry for the clinical application.
Newly released global TLDs, such as .xyz, .club, .site and .science, totaled 16.1million registrations, or 4.9 percent of all domains, as on March 31, with .xyz leading the list.
These include the original .gov, .mil, and .edu TLDs as well as .int, but also variations of .redcross and .olympic, among others.
Five out of the total of 17 registrars that QDR has accredited are based in Qatar and few more have approached to get accredited to realize the potential of offering geographic TLDs.
IC: Do you expect registrations on these new TLDs to be as robust as what we saw with .XXX?
ICANN, however, has repeatedly left the policing of TLDs to
There have been less than a dozen such TLDs (other than those for countries), but ICANN proposes to create hundreds more, including .wine, .vin and .vino for use by wine interests.
The article will examine the USPTO's policies regarding trademark registration on the Principal Register for marks that contain top-level domains ("TLDs") (3) as a part of the domain name in the applied for mark as well as for marks that consist solely of a TLD.
"Now we are starting to get to the point of actually being able to buy domains on the new TLDs, it's important for businesses to consider potential domain names they may want to grab.