Subdomain Center

About

Subdomain Center offers a free subdomain finder that requires no signup or API key. It searches over ten billion subdomains across more than one billion domains, even locating hosts behind Cloudflare that are missed by DNS brute-force methods and certificate logs. You can identify all domains linked to Bitrix or Grafana within seconds. This tool comprehensively scours the internet, collecting and analyzing data from across the web to map the world's shadow IT infrastructure. It operates with three distinct engines: cuttlefish discovers subdomains for a specific domain, octopus groups assets by brand, and ammonites searches for a keyword across every host.