Subdomain audit

Enter a domain: the tool aggregates names seen in Certificate Transparency (all levels). CT-only mode lists everything without DNS/TLS (suited to very large domains or zones without a public IP). Network mode probes DNS/TLS on a limited sample. Use CSV export to download the full list.

Root domain

Include crt.shCT only (full list, no DNS/TLS)

CT list mode: all names seen in certificate transparency (even if the domain has no public A/AAAA). Preview in the table; for hundreds of thousands of rows use Export CSV.