A better WHOIS lookup tool. Interactive TUI with tabbed views for WHOIS, DNS, mail, SSL/TLS, HTTP headers, and tech stack detection.
brew tap retlehs/tap
brew install retlehs/tap/quien
Or with Go:
go install github.com/retlehs/quien@latest
# Interactive prompt
quien
# Domain lookup (interactive TUI)
quien example.com
# IP address lookup
quien 8.8.8.8
# JSON output
quien --json example.com
- RDAP-first lookups with WHOIS fallback for broad TLD coverage
- IANA referral for automatic WHOIS server discovery
- Tech stack detection including WordPress plugins, JS/CSS frameworks, and external services parsed from HTML
- IP lookups with reverse DNS, network info, and abuse contacts via RDAP
- Automatic retry with exponential backoff on all lookups
- JSON subcommands for scripting:
quien dns,quien mail,quien tls,quien http,quien stack,quien all
Tip: If you want
quiento replace your default WHOIS tool, you can add an alias to your shell config:
Add quien as a agent skill so agents use it for domain and IP lookups:
npx skills add retlehs/quien
