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 · 205 ms

HostCertsFirst seenLast seen
guau.eus 2 2025-09-26 2026-08-28
*.guau.eus 2 2025-09-26 2026-08-28
data.guau.eus 2 2026-04-25 2026-04-25
login.pre.guau.eus 10 2025-08-19 2026-09-10
track.guau.eus 1 2025-12-24 2025-12-24
login.guau.eus 6 2025-08-12 2026-09-16

Programmatic access: API GET /v1/hosts/guau.eus (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/guau.eus.