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.

7 hosts · 222 ms

HostCertsFirst seenLast seen
ofigo.cz 20 2026-05-12 2026-09-25
*.ofigo.cz 15 2026-05-12 2026-09-25
notari.ofigo.cz 10 2026-04-24 2026-08-20
newsletter.ofigo.cz 6 2026-04-20 2026-08-16
client.ofigo.cz 5 2026-05-20 2026-09-17
dev.ofigo.cz 4 2026-04-15 2026-08-13
www.ofigo.cz 5 2026-05-20 2026-09-17

Programmatic access: API GET /v1/hosts/ofigo.cz (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/ofigo.cz.