WHOIS Lookup Online Free — Check Domain Registration, Expiry, Nameservers

Free WHOIS lookup tool. Check any domain's registrar, registration date, expiry date, nameservers, DNSSEC status, and abuse contact. Powered by RDAP, runs in your browser.

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About WHOIS Lookup

WHOIS is a protocol for querying domain registration data including ownership, expiration, and contact information. Modern WHOIS lookups use RDAP (Registration Data Access Protocol), the structured JSON-based successor. This tool queries public RDAP servers directly from your browser — your queries are not logged, cached, or stored on our side. Use it to check when a domain expires, who registered it, its authoritative nameservers, and whether DNSSEC is enabled.

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How to Use

Type a domain name in the input field (no http://, no path).
Click "Look up" or press Enter.
Review registrar, dates, nameservers, and status codes.
Click "Show raw RDAP response" to see the full machine-readable data.
Click "Copy" to copy the summary for sharing or pasting into tickets.

Use Cases

Check when a domain will expire before renewing or buying.
Verify domain ownership during a sale or transfer negotiation.
Find abuse contact emails to report spam or malicious activity.
Audit nameservers during DNS migration or incident response.
Confirm DNSSEC is enabled on domains you control.

Frequently Asked Questions

What is WHOIS?

WHOIS is a standard protocol used to query databases that store domain registration information such as the owner, registrar, creation date, expiration date, and nameservers.

What is RDAP and how is it different from WHOIS?

RDAP (Registration Data Access Protocol) is the modern replacement for WHOIS. It returns structured JSON, supports internationalization, and is more suitable for automated tools. This tool uses RDAP under the hood.

Is my query logged?

This tool forwards your query directly from your browser to rdap.org — we do not log, cache, or store queries on our servers. The RDAP server itself may log requests per its own policy.

Why do some fields show "—" or nothing?

GDPR and privacy regulations cause many registrars to redact personal contact information. The domain may still be valid even if registrant details are hidden.

Can I look up non-.com TLDs?

Yes. RDAP supports most gTLDs (com, org, net, io, dev, etc.) and many ccTLDs. Some ccTLDs with restrictive registries may return partial data.