How do I check who my .com.au domain is registered to?

You check the registration details of any .au domain through the official auDA WHOIS lookup, which shows who holds the domain and which registrar manages it. It is the public record of your domain’s ownership:

• Where to look - the auDA WHOIS tool returns the registrant, the registrar, the status, and the nameservers for any .au name.
• Registrant - the name and eligibility behind the domain; this is the party auDA treats as holding it, so it should be your business, not your web developer.
• Registrar and status - the company managing the domain and whether locks are in place; this tells you where to log in and whether transfers are blocked.

Run the lookup once a year - if the registrant is anyone but your business, fix it before it becomes a dispute.