A domain name is a sequence of letters and or numbers separated by one or more periods (".") that act as a pointer to a unique numerical address (IP) on a computer network such as the Internet. That address may host publicly available content, or may be a private intranet.
A domain name always ends with an extension of 2 or 3 characters. These characters can signify the country the website address is associated with or the type of organization; but not always - more on that below.
Domain names operate under the Domain Name System (DNS), which is essentially the address book of the Internet.
Thankfully, you don't need to memorise all of the below. As a registrant; usually all you need to be able to distinguish between is a domain name - the popular terms used collectively for second and third level domains - and a subdomain.
TLD - Top Level Domains
These are at the highest level in the DNS structure of the Internet. There are several different types of TLD's, being:
ccTLD - country code Top Level Domains
Two letter domains established for geographical locations; for example; .au
signifies Australia. When originally designated, usually only residents of a
country could register their corresponding ccTLD; but over the years quite a few
countries have allowed parties outside their shores to register website names. An
example of this is Tuvalu (
In the case of au
domain names, registrants must still be Australians or have
registered business interests in Australia. The strict registration eligibility
criteria for au names has meant
still strongly associated with Australia and has fostered a great deal of trust
and confidence in local online shoppers.
gTLD - generic Top Level SomIN
The best known generic TLD's include
.info - these can be
registered by anyone. However, some of the new gTLD's more recently released have various restrictions.
IDN ccTLD - internationalised country code top-level domains
A top-level name with a specially encoded format that allows it to be displayed in a non-Latin character set.
Below the TLD's are various other levels:
Directly below a TLD in the DNS hierarchy, e.g.
Directly below a second level in the DNS hierarchy. e.g.
The difference between second and third level can be a little confusing. For example, hotmail.com is considered a
second level domain, but
hotmail.com.au would be classed as a third level.
Part of a higher ranked domain name in DNS hierarchy; e.g.
Some services offer subdomain "registration" - but this usually isn't ideal for businesses and should probably be avoided.
As mentioned, knowing the differences of all of the above really isn't all that important - but something you will need to know is how to register a domain name. It's also a good idea to pick up some tips on choosing domains before you start your search.
How to register a name: Enter your choice in the search tool and click 'GO'. If after the check the domain names search results show your choice is available, you will then have the option to proceed to purchase registration; which is a very quick and easy process - start a search and find your ideal website address now.