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DNSDumpsterSecurityTrails
Free

Free to use in the browser.

 Freemium

An API key is available on sign-up; larger data services are aimed at security teams.

Web Web
  • Nothing to install
  • Quick overview of a domain's visible hosts
  • Historical DNS and WHOIS records going back years
  • Subdomain and associated domain discovery
  • Intended for authorized testing and checking your own domains
  • Results depend on publicly available DNS data
  • Requires an account to use
  • Oriented towards business security teams rather than casual users
Web application Web application, Hosted service
Closed source Closed source
License not stated License not stated
Not stated if an account is needed Account needed
Needs internet Needs internet

Checked September 24, 2026

Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.