Who owns this domain? When does it expire?
Type any domain (like example.com), click Check, and the tool fetches the public registration record: registrar, creation and expiry dates, status flags and nameservers.
The tool queries RDAP (Registration Data Access Protocol), the modern replacement for WHOIS that returns clean JSON. For TLDs without RDAP support (mostly older ccTLDs like .pl), the tool falls back to the classic TCP WHOIS protocol and parses the text response.
Most personal contact data is now hidden by GDPR, the tool tells you when that happened.
How to use it
- Type the domain in bare form: `example.com`, not `https://example.com/path`. The tool strips the scheme and path automatically.
- Click Check or press Enter. The query takes 1 to 3 seconds (RDAP) or 3 to 8 seconds (WHOIS fallback for ccTLDs).
- Read the cards: Registration (who runs the domain), Dates (with a warning when expiry is under 90 days), Status (registry locks in plain language), Nameservers and Abuse contact.
- If the result panel says available, the domain is not registered and you can grab it at your favorite registrar.
When this is useful
Six typical situations where a quick WHOIS / RDAP lookup saves time:
- Buying or auditing a domain. Check who currently owns it, when it expires, and which registrar it sits at.
- Phishing investigation. A suspicious lookalike domain pops up in your inbox, the creation date (very recent) and privacy redaction are big red flags.
- DNS migration. Confirm the nameservers match what your DNS provider expects after a change, then run a full record dump in the DNS lookup.
- Anti-hijack check. Verify clientTransferProhibited is on for your own domains so nobody can move them away.
- Renewal planning. Spot domains that expire in the next 90 days before someone else does.
- Abuse reporting. Pull the abuse@ address straight from the registrar record instead of hunting through their website.
After the domain checks out, validate the live cert in the SSL certificate checker and the crawler rules in the robots / sitemap validator.
Questions and answers
RDAP (Registration Data Access Protocol, RFC 7480) is the modern, JSON-based replacement for WHOIS. All gTLDs (.com, .net, .org, .io, .app, .dev and so on) have supported RDAP since 2021. Older ccTLDs (like .pl, .de, .eu) still rely on plain-text WHOIS over TCP port 43. The tool tries RDAP first and falls back to WHOIS automatically.