DNSDumpster
Free domain research tool that maps a domain's subdomains and hosts.
DNSDumpster describes itself as a free domain research tool that can discover hosts related to a domain. Its page says that finding visible hosts from the attackers perspective is an important part of the security assessment process, and that network defenders benefit from passive reconnaissance in a number of ways. It also says it can map an organizations attack surface using the DNS records associated with the target organization.
Official site: https://dnsdumpster.com
Last verified 2026-10-12.
Description rewritten from the vendor's own pages and checked against them. How entries are checked.