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 · 199 ms

HostCertsFirst seenLast seen
kaufland-marktplatz.at 7 2026-04-19 2026-09-28
email.kaufland-marktplatz.at 5 2026-05-22 2026-09-23
mta-sts.kaufland-marktplatz.at 5 2026-05-26 2026-09-21
www.kaufland-marktplatz.at 5 2026-04-22 2026-10-02

Programmatic access: API GET /v1/hosts/kaufland-marktplatz.at (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-marktplatz.at.