whois ☆
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Description:
Lookup tool for domain names and other internet resources
Type: Formula  |  Latest Version: 5.6.5@0  |  Tracked Since: Oct 13, 2025
Links: Homepage  |  formulae.brew.sh
Category: Networking
Tags: whois networking dns lookup utility cli
Install: brew install whois
About:
The whois command-line utility queries WHOIS servers to retrieve registration and ownership details for domain names and IP address blocks. It provides essential information such as registrar details, expiration dates, and registrant contact information. This tool is indispensable for network administrators, cybersecurity professionals, and developers managing internet infrastructure.
Key Features:
  • Supports both domain names and IP address lookups
  • Automatic server discovery for TLDs
  • Handles referral to correct registrars
  • Clean, scriptable output format
Use Cases:
  • Investigating domain ownership and registration history
  • Verifying IP address allocation and network information
  • Performing security reconnaissance and OSINT research
  • Auditing domain portfolio expiration dates
Alternatives:
  • dig – DNS lookup tool; can query specific WHOIS servers but lacks automatic referral handling
  • host – Basic DNS lookup utility; not designed for WHOIS queries
Version History
Detected Version Rev Change Commit
Oct 13, 2025 2:53am 0 VERSION_BUMP 1662663d
Sep 15, 2025 4:26pm 0 VERSION_BUMP 75f24986
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