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.

4 hosts · 223 ms

HostCertsFirst seenLast seenDNS
gmo-tenbin.ai 3 2025-10-06 2026-07-14 ok
*.gmo-tenbin.ai 2 2026-02-26 2026-07-14 —
stg.gmo-tenbin.ai 2 2025-09-10 2026-08-11 ok
market-insights.gmo-tenbin.ai 3 2026-05-23 2026-09-11 ok

Programmatic access, with DNS A records: API GET /v1/hosts/gmo-tenbin.ai (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-tenbin.ai.