Find every subdomain
of a domain.

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

5 hosts · 181 ms

HostCertsFirst seenLast seen
secureit.es 22 2025-06-19 2026-10-03
*.secureit.es 22 2025-06-19 2026-10-03
grc.secureit.es 1 2026-06-15 2026-06-15
*.grc.secureit.es 1 2026-06-15 2026-06-15
talento.secureit.es 10 2026-05-01 2026-08-27

Programmatic access: API GET /v1/hosts/secureit.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/secureit.es.