Utility

Subdomain Finder

Find subdomains listed in public Certificate Transparency logs after verifying you control the domain. This tool does not crawl hosts or run brute-force scans.

Use this tool

We log that you used the tool and basic settings, never what you type or upload. A site administrator may enable a heavily masked sample for selected non-sensitive tools; those samples are deleted after 30 days.

For domains you own or are authorized to assess. Add the provided DNS TXT record to prove control; results come from public certificate logs only.

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