Domain Details — WHOIS for .au & beyond

See who's behind the site you're on: registrant, ABN (.au), status, nameservers and live DNS.

Domain Details answers a simple but important question: who is behind the website you are looking at? Whether you are checking a supplier before paying an invoice, verifying an online store you have not dealt with before, researching a domain you are considering buying, or troubleshooting a client's site, the extension gives you the answer in one click, without leaving the page. Click the icon and the extension works out the registrable domain of the current tab. It understands that shop.example.com.au really means example.com.au, queries the domain's official registry directly, and presents the full registration record alongside live DNS. There are no third party WHOIS websites, no advertising, no CAPTCHAs and no scraping. You see the registry's own data, presented clearly. WHAT YOU SEE IN THE POPUP The registration section shows the registrar of record, the registration, expiry and last updated dates, DNSSEC status and the domain's status codes. If a domain expires within 60 days you receive a clear warning, which makes the extension a useful renewal safety net for domains that you or your clients depend on. The registrant section shows who the domain is registered to. For Australian domains this is where the extension is at its best, as described below. For global domains such as .com, .net, .org and hundreds of others, it shows whatever the registrar publicly discloses, which is often the organisation name. The technical contact section shows the registered technical contact's name, organisation, email and phone where published. Registries rarely hold contact details themselves, so the extension automatically follows the registry's referral to the registrar's own record and reads the technical contact from there. When details are privacy redacted, it points you to the registrar's contact relay form rather than presenting a dead end. The nameservers section lists the delegated nameservers on record at the registry, so you can see at a glance where a domain's DNS is hosted. The live DNS section shows the domain's current A, AAAA and MX records, resolved in real time over encrypted DNS over HTTPS. This is ideal for checking where a site actually points and who handles its email, and for spotting mismatches between the registry record and reality during a migration. The popup also includes a lookup box, so you can query any other domain without leaving it, and a Copy report button that produces a clean plain text summary of everything on screen, ready to paste into a support ticket, an email or your notes. BUILT FOR .AU, WITH THE DETAILS AUSTRALIAN USERS ACTUALLY WANT Most WHOIS tools treat Australian domains as an afterthought. This extension was built for them. It retrieves registrant and eligibility data straight from auDA's registry: the registrant's legal name, their Registrant or Eligibility ID and their eligibility type. When the ID is an ABN, the extension links directly to the Australian Business Register, so verifying the business behind a website takes seconds. That matters before paying an invoice, trusting an online store or carrying out due diligence on a supplier. Status information is presented meaningfully. Instead of a bare "server transfer prohibited", you see the registry's actual reason, for example "server transfer prohibited, Registry Lock". Omissions are handled honestly. auDA never publishes registration or expiry dates for .au domains, and it redacts technical contacts from its public registry data. Rather than showing empty rows and leaving you to wonder whether the lookup failed, the popup explains exactly why the data is not there and links you to auDA's official WHOIS service for the details only it can reveal. The extension also understands the full .au namespace. Suffixes such as com.au, net.au, org.au, id.au and asn.au, government and state suffixes such as nsw.gov.au, education domains and direct .au registrations are all handled correctly when deriving the domain from a hostname. AND BEYOND Outside .au, the extension is not limited to a hard coded list of registries. It discovers the correct authoritative server for any top level domain from IANA's official bootstrap registry, with rdap.org as a fallback. That covers .com, .io, .dev, .co.uk, .nz and any other TLD with a public registry service, today and as new TLDs appear. WHY RDAP MATTERS Classic WHOIS runs over a raw network protocol on port 43 that browsers simply cannot speak, which is why other WHOIS extensions either send your lookups through somebody else's server or scrape an advertising covered WHOIS website. This extension instead uses RDAP, the registries' official structured JSON successor to WHOIS. The data comes from the authoritative source, arrives in a machine readable format and is rendered directly in the popup. It travels straight from the registry to you, with nothing in between. WHO IT IS FOR Web developers and agencies can check a client's registrar, nameservers, expiry and DNS without switching tabs, then copy a report into the ticket. IT support staff and system administrators can diagnose website and email delivery problems faster by seeing the registry record and the live A, AAAA and MX records side by side. Businesses and shoppers can verify the ABN and registered entity behind an Australian website before trusting it with money. Domain investors and buyers can see status codes, expiry pressure and current delegation at a glance. Security conscious users can quickly gauge whether a site's registration looks legitimate before entering credentials or payment details. PRIVATE BY DESIGN There are no analytics, no tracking, no accounts and no backend server. The extension talks only to IANA's public bootstrap file, the relevant registry's public RDAP endpoint (for example auDA's registry for .au) and Cloudflare's public DNS over HTTPS resolver. Lookups are cached locally on your machine for six hours to keep things fast and courteous to registries, and the refresh button forces a fresh query whenever you want one. Permissions are minimal: the extension reads the current tab's address only when you click the icon, and stores nothing but its local cache. It is built with plain HTML, CSS and JavaScript under Manifest V3, with no third party libraries and no code you cannot inspect. FAST, LIGHT AND HONEST There are no background processes and no content scripts injected into pages. Nothing runs until you click. When data exists, you see it. When a registry withholds it, the popup says so plainly and points you to the official place to obtain it. That is the whole product: one click, the truth about a domain, from the source. Install Domain Details and the answer to "who is behind this site?" is never more than a click away. Thanks from www.thinktechnology.com.au