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.

9 hosts · 320 ms

HostCertsFirst seenLast seenDNS
cmmg.es 3 2026-06-21 2026-09-02 ok
*.cmmg.es 3 2026-06-21 2026-09-02 —
workstation.cmmg.es 4 2026-04-10 2026-09-03 ok
*.workstation.cmmg.es 4 2026-04-10 2026-09-03 —
p.cmmg.es 5 2026-05-26 2026-09-23 ok
pres.cmmg.es 4 2026-04-20 2026-08-18 ok
start.cmmg.es 6 2026-04-12 2026-09-07 nodata
*.start.cmmg.es 6 2026-04-12 2026-09-07 —
edu.cmmg.es 5 2026-05-07 2026-09-21 ok

Programmatic access, with DNS A records: API GET /v1/hosts/cmmg.es (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/cmmg.es.