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 · 230 ms

HostCertsFirst seenLast seen
kaufland-marketplace.cz 6 2026-04-16 2026-09-28
email.kaufland-marketplace.cz 5 2026-05-22 2026-09-24
mta-sts.kaufland-marketplace.cz 5 2026-05-24 2026-09-19
www.kaufland-marketplace.cz 5 2026-04-11 2026-09-22

Programmatic access: API GET /v1/hosts/kaufland-marketplace.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/kaufland-marketplace.cz.