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.

3 hosts · 292 ms

HostCertsFirst seenLast seenDNS
gmo-minihoken.com 3 2026-05-13 2026-08-28 ok
apply.gmo-minihoken.com 3 2026-04-27 2026-09-27 ok
*.apply.gmo-minihoken.com 3 2026-04-27 2026-09-27 —

Programmatic access, with DNS A records: API GET /v1/hosts/gmo-minihoken.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/gmo-minihoken.com.