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.

6 hosts · 185 ms

HostCertsFirst seenLast seen
trueatalaya.es 24 2026-05-08 2026-09-29
*.trueatalaya.es 17 2026-05-08 2026-09-29
oportunidad.trueatalaya.es 7 2026-07-28 2026-09-25
email.md.trueatalaya.es 3 2026-07-28 2026-09-26
go.trueatalaya.es 8 2026-05-07 2026-09-02
www.trueatalaya.es 7 2026-05-09 2026-09-12

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