DNSDumpster
Free domain research tool that maps a domain's subdomains and hosts.
DNSDumpster is a free online platform designed for domain research and network mapping. It allows users to discover subdomains, hosts, and associated IP addresses linked to a specific domain name. This tool is commonly used by security professionals and researchers to visualize the infrastructure of a target organization during legitimate reconnaissance or vulnerability assessments.
Official site: https://dnsdumpster.com
Last verified 2026-08-31.