WHOIS Lookup
Get domain registration information including registrar and expiration dates.
WHOIS Domain Lookup
WHOIS lookup reveals who registered a domain, when it was created, when it expires, which registrar holds it, what nameservers it uses, and whether DNSSEC is enabled.
WHOIS is the internet's public registry of domain ownership. Our tool queries both WHOIS and RDAP (the modern JSON-based successor) to return structured registration data for any domain. You'll see the registrar, creation and expiration dates, domain age in years, days until expiry, nameserver list, DNSSEC status, domain status codes, and the raw WHOIS response. Results include data for .com, .net, .org, .io, .br, .uk, .de and 200+ other TLDs.
What is WHOIS?
WHOIS is a query-response protocol that reveals the registration information for a domain name — registrar, owner details, creation date, expiration date, and nameservers.
WHOIS has been the standard domain registration lookup protocol since 1982. Maintained by ICANN and regional registries (ARIN, RIPE, APNIC), it stores public records for every registered domain. Privacy regulations like GDPR have caused many registrars to redact personal data, but technical data (registrar, dates, nameservers, status) remains publicly accessible. RDAP is the modern replacement — structured, JSON-based, and access-controlled.
WHOIS vs RDAP
RDAP is the modern JSON-based successor to WHOIS. It provides structured, machine-readable registration data, supports internationalization, and is compliant with GDPR access controls.
Traditional WHOIS returns unstructured plain text that varies by registry. RDAP (Registration Data Access Protocol) standardizes the response as JSON, making it machine-readable and consistent across registries. RDAP supports role-based access, meaning authenticated users can request more data. ICANN now requires all gTLD registries to support RDAP. Our tool automatically uses RDAP when available, falling back to WHOIS for older registries.
Domain Expiration & Renewal
Domains are leased for 1–10 years and must be renewed before expiration. An expired domain enters a redemption period before being released for public registration.
When a domain expires, it typically enters a grace period (0–45 days) where the registrant can renew at standard cost. Then it enters a redemption period (30 days) where recovery costs hundreds of dollars. Finally it enters a pending delete phase (5 days) before being released. Our tool shows the exact expiry date and days remaining so you can act before these costly deadlines. Set auto-renewal at your registrar and monitor expiration dates for all domains you manage.
Check registration data, expiration dates, and nameservers for any domain worldwide.
Look up a domain nowUse Cases
Domain investors use WHOIS to research ownership history and identify acquisition targets. Security researchers use it to investigate the registrant behind malicious domains. Legal teams use it to find abuse contacts for DMCA and trademark complaints. Website owners use it to monitor their own domain's expiration and registrar lock status.