WHOIS Lookup Tool

Queries WHOIS servers from the StackAtlas server (not browser-local). Don’t use production secrets.

Domain / IP Port 43 WHOIS

Query

Paste a domain like example.com or an IP like 8.8.8.8.

Connection

Uses IANA to find the correct WHOIS server when possible.

Server used

—

Elapsed

—

Raw WHOIS response

—

IANA referral (if used)

—

What WHOIS is

WHOIS is a registry/registrar lookup protocol (port 43). Results vary by TLD and may be redacted for privacy.

Privacy & redaction

Many registrars redact registrant info (privacy/proxy services).
Use WHOIS mainly for registrar, name servers, and dates.
For modern structured data, RDAP may be available for some registries.

Tips

Some WHOIS servers rate-limit; retry later if it fails.
Domain status values often include ICANN reference URLs.
Compare name servers with your DNS provider for troubleshooting.

How it works

The tool chooses an appropriate WHOIS server (IANA first when needed), forwards your query, then displays summary fields plus the raw response and referral output.

Domains and IPs are supported; RDAP is not used here, so responses are plain text.
Registries may redact contact data; treat results as advisory, not ownership proof.

Quick examples

Domain

example.com

Shows registrar, dates, name servers

IPv4

8.8.8.8

Returns ARIN referral and net range

If a TLD blocks WHOIS (GDPR/registry policy), expect minimal fields—check the raw block.

Mini FAQ

Why is contact info missing?

Many registrars redact personal data; look at registrar, status, and name servers instead.

Does this use RDAP?

No. Outputs are classic WHOIS text; RDAP may be added separately.

Are lookups rate-limited?

Some servers throttle; wait and retry if you hit errors or empty replies.