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Online Support Domain Names

What is a TLD?

A TLD means Top-Level Domain. It identifies the most general part of the domain name in an Internet address. It is also the highest domain level in the hierarchical Domain Name System.

The TLD is the last part of the domain name, in other words, the last label of a fully qualified domain name. For example, in the fully-qualified domain name, the .com will be the TLD.

The Internet Corporation for Assigned Names and Numbers (ICANN) is responsible for managing most top-level domains and operating the Internet Assigned Numbers Authority (IANA). TLDs are also referred to as domain extensions.

Types of TLDs

We can distinguish the following main groups of top-level domains:

Country-Code Top-Level Domains ccTLD Two-letter domains established for countries or territories, like .AU for Australia or .UK for United Kingdom. Some countries only allow citizens to register domains under their ccTLD.
Generic Top-Level Domains gTLD Top-level domains with three or more characters which are not generally associated with any particular country, such as .COM or .NET.

Some TLDs do not allow registrations at the first level. An example of this is .AU where it is currently not possible to register Instead you can register your domain at what is called the second level. With .AU this means you can register a,,, or

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