Here's a list of explanation


A Registrar (retailer for Domain Names) that has been accredited by auDA and AusRegistry, having met certain minimum criteria to act in this capacity.

The Administrative Contact is an individual, role or organisation authorised to interact with the Registry System or Registrar on behalf of the Registrant. The Administrative Contact should be able to answer non technical questions about the registration of a Domain Name. In all cases, the Administrative Contact is viewed as the authoritative point of contact for the Domain Name, second only to the Registrant. The Administrative Contact is a required contact within a valid Domain Name registration.

.au Domain Administration Ltd (auDA) is the policy authority and industry self-regulatory body for the .au Top Level Domain.

The Billing Contact is the individual, role or organisation designated to receive invoices for Domain Name registration and renewal fees.

See country code Top Level Domain.

Contacts are individuals or entities associated with Domain Name records. Typically, third parties with specific inquiries or concerns will use contact records to determine who should act upon specific issues related to a Domain Name record. There are typically three of these contact types associated with a Domain Name record, the Administrative contact, the Billing contact and the Technical contact.

Country code Top Level Domains (ccTLDs) are TLDs that are used to represent a country and are derived and restricted to a geographic location. Some examples of ccTLDs are ‘.uk’ for the United Kingdom, and ‘.au’ for Australia to name a few. A list of all ccTLDs can be found at the IANA website.

See Domain Name System.

A Domain is a subset of a DNS hierarchy used to group and identify a specific set of Resource Records typically common to or under control of a particular entity.

Domain Name means a sequence of characters that defines a realm of administrative autonomy, authority, or control in the Internet. Domain Names provide a system of easy-to-remember Internet addresses, which can be translated by the DNS into the numeric IP Addresses) used by the Internet.
A Domain Name is hierarchical and often conveys information about the type of entity using the Domain Name. A Domain Name is simply a label that represents a domain, which is a subset of the total Domain Name space. Domain Names at the same level of the hierarchy must be unique. Thus, for example, there can be only one .com at the top-level of the hierarchy, and only one at the next level of the hierarchy.

A valid Domain Name registered with AusRegistry must:
• be from 2 to 63 characters long in the 3LD
• only use the characters a-z, A-Z, 0-9, and – (the hyphen)
• not have a hyphen in the 3rd or 4th character position

The Domain Name System is the hierarchical system by which easy-to-remember, human-friendly names like “” are associated with IP addresses.

Open Second Level Domains Purpose For incorporated associations, political parties, trade unions, sporting and special interest clubs. For commercial entities, such as companies (with ACN as registered through ASIC), and businesses (registered with state governments). For individuals who are Australian citizens or residents. For commercial entities, such as companies (with ACN as registered through ASIC), and businesses (registered with state governments). For charities and non-profit organisations.
Closed Second
Level Domains
Purpose For educational institutions registered at federal or state level. This Domain Name is managed on behalf of the Australian education sector by the Australian Information and Communications Technology in Education Committee (AICTEC). For federal, state and local government bodies. This Domain Name is managed on behalf of the Australian government sector by the Digital Transformation Office (DTO).
Community Geographic Domain Names Purpose For community use of geographic names within the Australian Capital Territory. For example, For community use of geographic names within New South Wales. For example,
.au For community use of geographic names within the Northern Territory. For example, For community use of geographic names within Queensland. For example, For community use of geographic names within South Australia. For example, For community use of geographic names within Tasmania. For example, For community use of geographic names within Victoria. For example, For community use of geographic names within Western Australia. For example,

The Extensible Provisioning Protocol is used to provide a method of communication between Registries and Registrars. EPP is described in RFC 5730, RFC 5731, RFC 5732, RFC 5733 and RFC 5735; and as updated from time to time; and

The service provided by AusRegistry to enable multiple Registrars to administer Domain Name information.

A TLD that is not derived from or restricted to a geographic location such as a country code Top Level Domain. Some examples of gTLDs are .com, .net and .org to name a few. A list of all gTLDs can be found at the IANA  website

See Name Server.

See Internet Corporation for Assigned Names and Numbers.

ICANN was formed in 1998. It is a not-for-profit public-benefit corporation with participants from all over the world dedicated to keeping the Internet secure, stable and interoperable. It promotes competition and develops policy on the Internet’s unique identifiers. Further information can be found on the ICANN website.

The communications protocol underlying the Internet, IP allows large, geographically-diverse networks of computers to communicate with each other quickly and economically over a variety of physical links.

An IP Address is the numerical address by which a location in the Internet is identified. Computers on the Internet use IP Addresses to route traffic and establish connections among themselves; people generally use the human-friendly names made possible by the Domain Name System.

See Internet Assigned Numbers Authority.

The Internet Assigned Numbers Authority (IANA) is responsible for the global coordination of the DNS Root, IP addressing, and other Internet protocol resources. Further information can be found on the IANA website.

Internationalised Domain Names (IDNs) are Domain Names that include characters from scripts other than the twenty-six letters of the basic Latin alphabet “a-z”. An IDN can contain Latin letters with diacritical marks, or may consist of characters from non-Latin scripts

Means a string of characters consisting of one or more letters, digits or a hyphen (‘-‘) characters separated by a period (‘.’).

A computer that has both the software and the data (zone files) needed to resolve Domain Names to IP Addresses.

Operational Testing Environment is a system which matches or replicates the services provided by the Registry System, for testing purposes. This is generally used by Registrars to test interoperability of their systems with the Registry System

The individual or organisation that registers a specific Domain Name. This individual or organisation holds the right to use that specific Domain Name for a specified period of time, provided certain conditions are met and the registration fees are paid.

A person or entity that, via a contract with Registrants and a Registry, provides front-end Domain Name registration services to Registrants. These services form the public interface to Registry services. Registrars may provide registration services for Domain Name from one or more Second-Level Domains within Australia or a multiple of TLDs around the world.

Has the exclusive responsibly for maintenance of a centralised Registry for its particular TLD. AusRegistry is the Registry for Domain Names in the .au ccTLD. The Registry is the authoritative master database of all Domain Names registered in each top-level domain. The Registry operator maintains the master database and also generates the zone file that allows computers to route Internet traffic to and from TLDs anywhere in the world.

The Registry Services means the EPP Service, the WHOIS Service, the DNS Service and other services offered by AusRegistry.

The term used to describe the process by which Domain Names are matched with corresponding Internet Protocol (IP) numbers. Resolution is accomplished by a combination of computers and software, referred to as name servers that use the data in the Domain Name System to determine which IP numbers correspond to a particular Domain Name.

Remote Object Identifier. AusRegistry produces ROIDs every time a Registry object is created.

A machine that has the software and data needed to locate name servers that contain authoritative data for the top-level domains (e.g. root servers know which name servers contain authoritative data for .com, .net, .fr, .UK etc.). The root servers are, in fact, name servers and contain authoritative data for the very top of the Domain Name System (DNS) hierarchy. Currently, technical specifications limit the number of root servers to 13. These machines are located around the globe, in the U.S., the UK, Sweden, and Japan.

A Resource Record is a record within a DNS hierarchy that assists in locating the network resources associated with a particular Domain, including the location of authoritative servers for the Domain and any associated Sub-Domains.

See Second Level Domain.

The alphanumeric string before the dot and the TLD. AusRegistry administers all Domain Names within the .au TLD within the .com, .net, .org, .id and .asn Second Level Domains.

The Registrar responsible for the submission of the Domain Name information to the Registry on behalf of the Registrant.

SSL is an acronym for “Secure Socket Layer”, a security protocol that provides communications privacy over the Internet. The protocol allows client/server applications to communicate in a way that is designed to prevent eavesdropping, tampering, or message forgery.

The technical contact is the individual, role or organisation who is responsible for the technical operations of the delegated zone. This contact likely maintains the Domain Name server(s) for the Domain Name. The technical contact should be able to answer technical questions about the Domain Name, the delegated zone and work with technically oriented people in other zones to solve technical problems that affect the Domain Name and/or zone.

The alphabetic string before the dot and the 2LD. Between 2 and 63 characters long. For example, this is the ‘yahoo’ in

See Top Level Domain.

Superset of gTLDs and ccTLDs. Every Domain Name must end with a TLD. Australian Domain Names all end in the .au ccTLD.

TLDs are the names at the top of the DNS naming hierarchy. They appear in Domain Names as the string of letters following the last (rightmost) “dot”, such as “net” in ““. The Administrator for a TLD controls what Second Level names are recognised in that TLD. The Administrators of the “root domain” or “root zone” control what TLDs are recognized by the DNS. Commonly used TLDs include .com, .net, .edu, .jp, .de, etc.

A name, symbol, or other device identifying a product, officially registered and legally restricted to the use of the owner or manufacturer.

(pronounced as the phrase ‘who is’) is query and response protocol that standard within the Domain Name Industry for querying Registry databases to determine certain information about that Domain Name.

The WHOIS Service is a method made available to the public by AusRegistry, whereby an enquirer can query the Registry database to determine certain information regarding a Domain Name.

Means a sub-section of the global DNS hierarchy.

The Zone file a file that contains the Resource Records of a particular Domain.