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 · 204 ms

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HostCertsFirst seenLast seen
fi-group.com 3 2026-03-27 2026-09-15
*.fi-group.com 3 2026-03-27 2026-09-15
fipeople.fi-group.com 9 2026-05-10 2026-09-07
help.fi-group.com 2 2026-05-18 2026-05-18
bonificaciones.fi-group.com 1 2026-04-19 2026-04-19
opv.fi-group.com 302 2026-04-18 2026-10-14
fi-university.fi-group.com 3 2026-04-19 2026-07-03

Programmatic access: API GET /v1/hosts/fi-group.com (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/fi-group.com.