📡 WHOIS Lookup Tool

Enter a domain (e.g., example.com) or an IP address (e.g., 104.20.23.154 or 2606:4700:10::6814:179a).

WHOIS data may include Terms of Service and inaccuracy-report links from the registry. Respect rate limits.

Tip: Cache IANA bootstrap files and WHOIS responses to improve performance and reduce registry load.