The naming rules for .au require registrations under second-level categories that describe a type of entity.
.com.au, for example, is designed for commercial entities. This follows a similar allocation policy to that formerly used in other countries such as the
United Kingdom,
Canada and
New Zealand. Registrations are currently permitted below a second-level domain, such as "yourname.com.au". In April 2016, auDA announced it would introduce registrations directly at the second level, such as "yourname.au". Direct registrations were due to be implemented in 2017, although an ongoing debate on how
cybersquatting would be mitigated led to a delay, with a new launch date of 24March 2022. Registration of a .au domain is completed through a reseller, known as a registrar, with the registry acting as the wholesale provider. auDA manages domain name policy as the
ICANN and
Australian Government-endorsed manager of the .au
DNS.
Second-level domains The .edu.au, .gov.au and .csiro.au namespaces are referred to as "closed" namespaces, since registration is not available to the general public. All other second-level namespaces are referred to as "open" namespaces. According to an annual report filed by
.au Domain Association (auDA) in Q4 2022, one in six .au domains were a
second-level domain.
.au Direct namespace The direct second-level domain namespace, marketed as ".au Direct" has been made available to the public from 24 March 2022. The .au Direct namespace is intended to complement rather than replace the existing second-level domain namespaces and to provide domain holders with the option to register "shorter, simpler domain names". Unlike the existing second-level domain namespaces, there is no restriction on the domain names that can be registered in the .au Direct namespace, provided the domain name applicant satisfies the Australian presence requirement. Three priority categories exist: Eligible domain name holders could apply during an allocated sunrise period commencing 24 March 2022 until 20 September 2022. For example, the holders of
domain.com.au,
domain.org.au and
domain.net.au were each eligible to apply for priority registration of
domain.au during the sunrise period. If there were more than one priority application for a given domain name, priority is allocated as follows: • Category 1 applications had priority over Category 2 applications. • Where there are two or more Category 1 applications, priority was allocated by agreement between the respective holders, with allocation being placed on hold until consensus is reached or there is only one remaining Category 1 applicant. • Where there are two or more Category 2 applications, priority was allocated to the holder with the earliest creation date. Any unclaimed domain names were released to general availability at the end of the sunrise period.
State and Territory Namespaces Introduced in 2004, "community geographic domain names" (CGDNs), later renamed to "state and territory namespaces", are intended to be used for "community websites that reflect community interests such as local business, tourism, historical information, culture, sporting groups, local events and news" of a local community. These domains were initially managed by the .au Community Domains Trust (auCD) on behalf of auDA. The funding of auCD was provided from a ballot of locality names in the .com.au and .net.au domain spaces; previously, any locality with a postcode had been restricted from being registered as a commercial domain name. CGDNs use the
state or territory's common abbreviation as the second level of the domain. For example, a community based in Victoria would receive a domain ending in ".vic.au", a Northern Territory community would use ".nt.au", and so on. The third level of the domain must be an addressable locality within that state or territory, of the form "townname.vic.au". Where a name is duplicated within a state – for instance, between a smaller town, and a suburb of a larger town or city — the locality name may be suffixed with the name of the
local government area, town or city to which it is associated (e.g. "suburbname-cityname.vic.au"). with a further 115 either approved or awaiting approval.
Third-level domains The use of ".gov.au" as a second level domain is for Australian Federal government and for its initiatives, while the use of a third-level domain, being an Australian state abbreviation, is an identifier that the domain belongs to either the relevant state government or a local government inside the state. The ".edu.au" is also split up into state-based categories in most cases. auDA has delegated responsibility of the .edu.au domain to
Australian Information and Communications Technology in Education Committee (
AICTEC), which formed a specialist sub-committee, .edu.au Domain Administration Committee (eDAC). Schools use a domain name that reflect their locale, and these state-based third-level domains are managed independently by the states. For example, a school in
Western Australia would register "schoolname.wa.edu.au". Similarly, replacing the state part of these domains,
Victoria would use ".vic",
Queensland would use ".qld",
South Australia would use ".sa",
Tasmania would use ".tas",
Northern Territory would use ".nt" and the
Australian Capital Territory would use ".act". However, after a change of internet services in
Queensland State Schools their domain names were changed from "schoolname.qld.edu.au" to "schoolname.eq.edu.au" ("eq" is an abbreviation of the government department name "Education Queensland"). This is not the case for private schools in
Queensland. Often, domains can even contain a fourth level: for instance, a NSW public school might have the domain "schoolname.schools.nsw.edu.au". Tertiary institutions are typically exempt from requiring state-based distinctions. For example,
Edith Cowan University in Western Australia has a domain of "ecu.edu.au" rather than "ecu.wa.edu.au",
RMIT University in Victoria uses "rmit.edu.au" rather than "rmit.vic.edu.au". This difference can be associated with states having responsibility for primary and secondary education while the Commonwealth has responsibility for tertiary education; tertiary institutions often having a presence in multiple states.
Historic second-level domains Some second-level domain names are no longer actively used. Whilst registrations are
grandfathered for some, no new registrations are accepted. ==Registration policies and rules==