[Maximum 100 domains are allowed]
The Bulk WHOIS Lookup tool retrieves registration data for hundreds or thousands of domain names in a single operation — delivering the same structured WHOIS records you'd get from individual queries, but at the speed and scale that security operations and domain management actually demand. Enter a list of domains and get registrant details, registrar, creation/expiry dates, nameservers, and domain status for every one simultaneously.
SOC teams regularly receive indicator lists from threat feeds, partner organizations, or internal detections containing dozens to hundreds of suspicious domains. Running individual WHOIS lookups against each is impractical. Bulk WHOIS processes the entire list and immediately surfaces key triage data: registration dates (newly registered domains are higher risk), registrar patterns, and shared registrant details that cluster domains into campaigns.
Brand protection teams run daily bulk WHOIS checks against lists of domains containing their brand keywords — identified via our Domain Discovery Tool. Getting WHOIS data for 500 candidate domains at once lets analysts quickly filter to newly registered, suspicious registrants and prioritize takedown requests.
Domain registrars, resellers, and investors managing large portfolios use Bulk WHOIS to audit their entire inventory at once — verifying registration details are accurate, catching domains approaching expiry, and identifying nameserver configurations that need updating.
Legal and compliance teams conducting due diligence on domain portfolios during M&A transactions use Bulk WHOIS to validate every domain in the target company's inventory against registration records — confirming ownership, checking for liens or transfer locks, and surfacing any domains registered to individuals rather than the company entity.
One domain per line, no protocols needed. Enter 'example.com' not 'https://example.com'. Subdomains are also supported and resolve to the parent domain's WHOIS record.
