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.

4 hosts · 266 ms

HostCertsFirst seenLast seen
fr.lumories.ch 6 2026-04-28 2026-08-26
support.fr.lumories.ch 22 2026-05-14 2026-09-27
collector.sst.fr.lumories.ch 4 2026-06-12 2026-10-10
www.fr.lumories.ch 6 2026-04-28 2026-08-26

Programmatic access: API GET /v1/hosts/fr.lumories.ch (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/fr.lumories.ch.