Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

5 hosts · 343 ms

HostCertsFirst seenLast seenDNS
hamiltonzanze.com 16 2026-04-17 2026-09-25 ok
*.hamiltonzanze.com 5 2026-05-28 2026-09-25 —
funds.hamiltonzanze.com 14 2026-04-17 2026-08-13 ok
invest.hamiltonzanze.com 12 2026-04-17 2026-09-01 ok
www.hamiltonzanze.com 10 2026-04-19 2026-08-16 ok

Programmatic access, with DNS A records: API GET /v1/hosts/hamiltonzanze.com (API key for paging).

Shown here: hostnames with a certificate that is valid now or expired within the last 90 days. The full history since 2013 — hostnames whose last certificate expired earlier — is a Pro plan method: GET /v1/hosts-history/hamiltonzanze.com.