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.

8 hosts · 259 ms

HostCertsFirst seenLast seenDNS
gmo-clinic-map.com 1 2026-02-19 2026-02-19 ok
*.gmo-clinic-map.com 1 2026-02-19 2026-02-19 —
cms.test1.gmo-clinic-map.com 2 2026-08-20 2026-08-20 ok
cms.dev1.gmo-clinic-map.com 7 2026-08-26 2026-09-03 ok
cms.dev2.gmo-clinic-map.com 1 2026-09-02 2026-09-02 ok
cms.staging.gmo-clinic-map.com 1 2026-09-02 2026-09-02 ok
cms.gmo-clinic-map.com 1 2026-09-03 2026-09-03 ok
support.gmo-clinic-map.com 4 2026-06-26 2026-08-25 ok

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