Whois Lookup
Check WHOIS and RDAP information for a domain name or IP address. JSON-native RDAP first, with classic WHOIS fallback.
Notes:
- This tool prefers RDAP (JSON-native) and falls back to classic WHOIS if needed.
- Returned fields vary by registry/TLD. Some records are redacted for privacy (e.g., GDPR).
- IP lookups show allocation/assignment info (owner of the block), not end-user identity.
- Internationalized domains are normalized to ASCII (Punycode) before lookup.
- Requests are rate-limited to prevent abuse. Try again after a short while if you hit the limit.
- Results are fetched live and not persisted by this tool.