Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

5 hosts · 285 ms

HostCertsFirst seenLast seenDNS
cheapenergy24.de 6 2026-06-02 2026-09-30 ok
metabase.cheapenergy24.de 5 2026-06-01 2026-09-29 ok
staging.cheapenergy24.de 3 2026-06-17 2026-08-16 ok
staging-wp.cheapenergy24.de 5 2026-04-24 2026-08-22 ok
www.cheapenergy24.de 6 2026-06-02 2026-09-30 ok

Programmatic access, with DNS A records: API GET /v1/hosts/cheapenergy24.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/cheapenergy24.de.