The Registration Data Access Protocol (RDAP) is the modern, HTTP-based replacement for traditional WHOIS. It returns structured JSON for domains and IP resources.

Why not use port 43 WHOIS?

RDAP works over HTTPS, supports redirection, and provides standardized data. Many registries throttle or deprecate legacy port 43 WHOIS.

WHOIS (RDAP) Lookup

Look up domain and IP registration details via RDAP. See registrar, status, key dates, and entities in a privacy-friendly format.

Tool Guide & Tips

Understand WHOIS and RDAP

Retrieve domain registration data via RDAP: registrar, status, key dates, nameservers, and contacts. RDAP returns structured JSON over HTTPS, making it easier to parse and more privacy‑friendly than legacy WHOIS.

RDAP over HTTPS Registrar, status, expiry Structured JSON results

Troubleshoot common issues

Monitor renewal dates to avoid lapses.
Verify nameservers after DNS provider changes.
Check domain status codes for transfer locks.

What’s next

Next: monitor domain expiry, registrar locks, and nameserver changes after migrations. Need managed DNS and reliable hosting for your projects?

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