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 · 236 ms

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HostCertsFirst seenLast seen
cabaia.de 1 2025-12-17 2025-12-17
b.cabaia.de 9 2026-05-28 2026-09-24
trk.cabaia.de 3 2026-05-14 2026-09-27
www.cabaia.de 2 2026-02-18 2026-06-29

Programmatic access: API GET /v1/hosts/cabaia.de (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/cabaia.de.