WHOIS Port 43 Basics
Query syntax, text formats, and parsing challenges of legacy WHOIS.
WHOISport 43
Overview
Query syntax, text formats, and parsing challenges of legacy WHOIS.
Key points
- Combine IANA bootstrap with local indexes for better coverage.
- Keep WHOIS port 43 fallback for RDAP-less TLDs.
- Respect registry rate limits; cache aggressively.
- Expose data source and partial flags in API output.
WHO.GA in practice
WHO.GA (Whoga) provides unified web and JSON API lookup for scenarios like "WHOIS Port 43 Basics", handling bootstrap routing, registrar referrals, and WHOIS fallback. Try who.ga or api.who.ga/<query>.