Client-Side UtilityLocal memory execution • Zero server telemetry
WHOIS & ICANN RDAP Domain Lookup
Query authoritative domain registration records via modern ICANN RDAP protocol: inspect domain ownership, registration dates, expiration timelines, registrar contacts, and nameservers.
IMaintained by Infrastructure & SEO Desk
Published
Domain Registry Target
Quick examples:
Ready to query domain registry
Enter any domain above to check registrar information, expiration dates, domain statuses, and nameservers.
IMaintained by Infrastructure & SEO Desk
Published
Calculation Methodology & Formula
Queries ICANN standard Registration Data Access Protocol (RDAP) endpoints to retrieve verified, structured registry data with cryptographic accuracy.
RDAP Query: https://rdap.org/domain/{domain} -> Registry Entities, Dates, NameserversWorked Example: Lookup GitHub.com Ownership Details
Verify registrar and expiration date for github.com.
domain:github.com
Expected OutputRegistrar: MarkMonitor Inc., Status: clientDeleteProhibited, Nameservers: ns-xxx.awsdns...
Returns verified domain registration records directly from the registry authority.
Technical Constraints & Limitations
- GDPR / ICANN privacy proxy services mask personal registrant contact information on public records.
- Restricted to top-level and second-level domain registrations; subdomains are managed on authoritative DNS.
Frequently Asked Questions
What is RDAP and how is it different from legacy WHOIS?
Registration Data Access Protocol (RDAP) is ICANN’s official modern replacement for legacy WHOIS. Unlike unstructured port-43 text dumps, RDAP delivers standardized, machine-readable JSON data with enhanced security, standardized error handling, and internationalization.
Why are personal owner contact details masked?
Under ICANN policies and data protection regulations (like GDPR), domain registrars redact personal phone numbers and home addresses to prevent identity theft, spam, and unsolicited marketing.