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WHOIS Lookup - Domain & IP Registration Data
Access registration records for any domain name or IP address. WHOIS lookup reveals ownership information, registration dates, nameserver configuration, and registrar details essential for due diligence and investigation.
Understanding WHOIS Data
WHOIS is the internet's original registration database. When someone registers a domain or receives an IP allocation, that information enters WHOIS records maintained by registries and registrars.
WHOIS data includes:
- Registrant information - Who registered the domain (often privacy-protected)
- Registration dates - When the domain was created, last updated, and expires
- Nameservers - Authoritative DNS servers for the domain
- Registrar - The company through which the domain was registered
- Status codes - Current state (active, locked, pending transfer, etc.)
WHOIS for Domains vs IPs
Domain WHOIS queries registrars and registries managing TLDs. Results vary by TLD - some provide full contact information while others enforce privacy.
IP WHOIS queries regional internet registries (ARIN, RIPE, APNIC, LACNIC, AFRINIC). Results show network allocation, organization, and abuse contacts.
Practical Applications
Domain acquisition - Check registration status, expiration date, and current owner before making purchase offers.
Brand protection - Monitor WHOIS for domains similar to your trademarks. Identify potential cybersquatting or trademark infringement.
Fraud investigation - Recently registered domains are higher risk. WHOIS shows domain age and registration patterns.
Abuse reporting - Find correct contacts for reporting spam, phishing, or other abuse. WHOIS provides registrar and hosting abuse emails.
Privacy Protection and WHOIS
Many registrars offer WHOIS privacy, replacing registrant details with proxy information. GDPR further restricts personal data in WHOIS for EU registrants.
Despite privacy protections, WHOIS still reveals registrar, nameservers, dates, and status - enough for most investigative purposes.