WHOIS Domain Lookup
Look up registration data for a domain. Where its registry publishes the details, see its registrar, when it was created, when it expires, and which nameservers it uses.
Focused on registration and registrar details. Need renewal urgency and status codes instead? Try the Domain Expiry Checker.
New to WHOIS? Read our Domain Expiry and WHOIS guide for a full explanation.
What is WHOIS?
WHOIS (pronounced "who is") is a protocol for querying databases that store the registered users of a domain name. Every domain registered on the internet has associated registration data including the registrar, creation and expiry dates, and nameservers.
This tool uses RDAP (Registration Data Access Protocol), the modern replacement for traditional WHOIS. RDAP provides structured, machine-readable data directly from the authoritative registry, ensuring accuracy. A few registries publish no RDAP service; for .io, .co, .me and .eu the tool reads the registry's WHOIS server instead and shows its record with the contact lines removed.
What can WHOIS tell you?
- Registrar: Which company the domain was registered through (e.g. GoDaddy, Cloudflare, Namecheap).
- Creation date: When the domain was first registered. Newly created domains are a common phishing indicator.
- Expiry date: When the registration expires. Lapsed domains can be re-registered by attackers.
- Nameservers: Which DNS provider the domain uses. Changes to nameservers can indicate a domain takeover.
- DNSSEC: Whether the domain has signed its DNS records, protecting against DNS spoofing.
- Abuse contact: Where to report malicious use of the domain.
Why check WHOIS for suspicious domains?
If you have discovered a lookalike or suspicious domain, WHOIS data helps you assess the threat. A domain registered yesterday is far more suspicious than one registered ten years ago. The registrar and nameservers can reveal whether the domain is parked, hosted on bulletproof infrastructure, or genuinely in use.
Frequently asked questions
Why is the domain owner's name not shown?
Since GDPR came into effect in 2018, most registrars redact personal information from public WHOIS data. This tool shows the registrar and technical details, not the registrant's name or address.
What is RDAP and how is it different from WHOIS?
RDAP is the modern, standardised replacement for WHOIS. It returns structured JSON data (instead of free-text), supports HTTPS, and is served by the authoritative registry. This tool reads it from the registry's own RDAP service wherever the registry runs one.
Which TLDs are supported?
We support RDAP lookups for .com, .net, .org, .uk, .co.uk, .org.uk, .de, .fr, .nl, .app, .dev, .com.au and many more, though some registries publish less than others (.de, for example, gives no expiry date). IANA lists no RDAP server for .io, .co, .me, .eu, .us, .co.nz or .co.jp. For .io, .co, .me and .eu we read the registry's WHOIS server instead (EURid's .eu record has no dates); .us, .co.nz and .co.jp return no registration data. If a TLD is not supported, you will see a clear message.