WHOIS Lookup

Look up domain registration information and IP address ownership details.

Enter a domain name or IP address to lookup

Understanding WHOIS

What is WHOIS?

WHOIS is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource. It provides information about domain registrations, IP address ownership, and other registrant details.

whois example.com

Domain WHOIS

Contains information about domain registration:

  • Registrant contact information
  • Registrar details
  • Creation and expiration dates
  • Nameserver information
  • Administrative contacts

IP WHOIS

Contains information about IP address ownership:

  • ISP / Organization info
  • IP address range allocation
  • Regional Internet Registry (RIR)
  • Administrative contacts
  • Abuse contact information

Privacy Considerations

WHOIS data is publicly accessible and contains contact information. Many registrars now offer:

  • WHOIS Privacy/Domain Privacy: Replaces contact info with registrar's proxy
  • GDPR Compliance: EU regulations may restrict WHOIS access
  • Privacy protection: Prevents spam and unwanted contact

Common Uses

  • Domain Research: Check who owns a domain and when it expires
  • IP Ownership: Find which organization owns an IP address
  • Contact Information: Get administrative contact details
  • Security Investigation: Track malicious domains or IPs
  • Business Intelligence: Research competitors and organizations
  • Abuse Reporting: Find abuse contact for problematic services