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 · 315 ms

HostCertsFirst seenLast seenDNS
mediamarktsaturn.de 5 2026-06-05 2026-10-03 ok
coupons.mediamarktsaturn.de 5 2026-04-29 2026-08-28 ok
dev.coupons.mediamarktsaturn.de 5 2026-04-13 2026-10-04 ok
www.mediamarktsaturn.de 5 2026-06-05 2026-10-03 ok
delivery.mediamarktsaturn.de 2 2026-07-03 2026-08-25 ok

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