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.com.au domain: registry, rules and WHOIS

Australian companies and commercial sites

Facts

Type
Second-level zone under .au
Registry operator
auDA (.au Domain Administration)
Country or territory
Australia
RDAP
Yes (rdap.cctld.au)
WHOIS server
whois.auda.org.au
Registration
Eligibility requirements apply
Typical use
Australian companies and commercial sites

RDAP availability is taken from the IANA RDAP bootstrap file published on 2026-09-16; WHOIS server and delegation year from the IANA root zone database. Registry policies change: check the registry's own policy before relying on an eligibility rule.

What is .com.au?

.com.au is the commercial second-level zone under .au and the extension most Australian businesses use. It is a zone inside .au, not a TLD of its own, and it is on the Public Suffix List, so example.com.au is treated as a registrable domain.

Who can register it

In addition to the general Australian presence requirement, .com.au is for commercial entities: the registrant is identified by an ABN, ACN or similar identifier, and the name must relate to the registrant, for example by matching its name, a trade mark, or a product or service it provides.

WHOIS, RDAP and privacy

An RDAP service for .au (rdap.cctld.au) is published in the IANA RDAP bootstrap file. OrbitProbe reads registration data from it first, as structured JSON: registrar, creation and expiry dates, EPP status codes and nameservers. For ccTLDs, what is published is decided by the registry and local law rather than by ICANN, so output differs from one extension to the next. Most registries do not show the personal data of individuals in public output. OrbitProbe only ever shows the organisation name and country.

Look up a .com.au domain

FAQ

Who can register a .com.au domain?

In addition to the general Australian presence requirement, .com.au is for commercial entities: the registrant is identified by an ABN, ACN or similar identifier, and the name must relate to the registrant, for example by matching its name, a trade mark, or a product or service it provides.

How do I run a WHOIS lookup for a .com.au domain?

Type the name, in the form example.com.au, into the form on this page. OrbitProbe first queries the RDAP service of the .au registry (rdap.cctld.au). The result shows where the data came from and when it was observed.

Does .com.au support RDAP?

Yes. The IANA RDAP bootstrap file dated 2026-09-16 publishes rdap.cctld.au for .au. The classic WHOIS server is whois.auda.org.au.

Is .com.au a top-level domain?

No. The top-level domain is .au; .com.au is a second-level zone the registry operates beneath it. Because it is on the Public Suffix List, tools and browsers treat example.com.au as the registrable domain. WHOIS and RDAP data come from the .au registry.