Network & IP Runs in browser Updated 30 Mar 2026

WHOIS Lookup

Look up domain registration details — registrar, creation/expiry dates, nameservers, and DNSSEC — via RDAP.

Domain name

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How to use WHOIS Lookup

Enter a domain

Type the domain you want to look up — for example, example.com.
Run the lookup

Click the Lookup button or press Enter to query the authoritative RDAP registry.
Review registration details

See registrar, registration and expiry dates, name servers, domain status codes, and DNSSEC status at a glance.
Inspect raw data

Expand the Raw RDAP Response section to view the complete JSON returned by the authoritative registry.

WHOIS Lookup FAQ

What is RDAP?

RDAP (Registration Data Access Protocol) is the modern IETF-standardised replacement for legacy WHOIS. It returns structured JSON over HTTPS — easier to parse and more reliable than raw WHOIS text output.

Why might some fields show empty or redacted?

Privacy protection services, GDPR regulations, and some TLD registries redact registrant contact details, dates, or DNSSEC information. This is expected for privacy-protected domains.

Is this the same as traditional WHOIS?

It returns similar registration data but uses the RDAP protocol. Some legacy WHOIS fields (like registrant contact details) may not be available through RDAP due to privacy regulations.

Does this tool store my queries?

No. Queries are sent directly from your browser to rdap.org and then to the authoritative registry. Nothing is logged or stored by this tool.

Can I find who owns any domain?

Ownership details are often redacted due to GDPR and domain privacy services. You will always see the registrar and key dates — registrant identity is frequently hidden.

What are domain status codes?

Status codes like clientTransferProhibited or serverHold indicate what operations are allowed or blocked on the domain. clientDeleteProhibited means the domain cannot be deleted by the registrant, often a security lock.

What does DNSSEC status mean?

DNSSEC (DNS Security Extensions) adds cryptographic signatures to DNS records to prevent DNS spoofing. A domain with DNSSEC enabled is signed at the registry level.

How current is the data?

RDAP queries the authoritative registry in real time. Results reflect the current state of the domain record at the moment of the query.

Does this work for all top-level domains?

Most major TLDs (.com, .net, .org, .io, country codes) support RDAP. Some legacy or niche TLDs may not yet support RDAP — a plain WHOIS query would be needed for those.

Background

Look up WHOIS-style domain registration data for any domain using RDAP, the IETF-standardised replacement for traditional WHOIS. Enter any domain and see the registrar, registration date, expiry date, name servers, domain status codes, and DNSSEC status. The full raw RDAP JSON response is available in a collapsible section for deep inspection.

RDAP returns structured JSON over HTTPS — no API key required. All queries are sent directly from your browser to the rdap.org bootstrap service, which redirects to the authoritative registry server for the TLD.

Who is this for: domain buyers checking if a domain is about to expire, security researchers investigating suspicious domains, IT admins verifying registrar details, journalists identifying domain owners, and developers automating domain intelligence workflows. Covers the same fields as whois.domaintools.com without requiring an account.

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WHOIS Lookup: How to Find Out Who Owns a Domain

Find out who owns any domain with WHOIS lookup. Learn what WHOIS data shows, why it's often hidden, how GDPR changed everything, and how to use it for security research.