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.

8 hosts · 271 ms

HostCertsFirst seenLast seenDNS
mediamarkt.lu 16 2026-04-09 2026-10-05 ok
mdc.mediamarkt.lu 3 2026-04-29 2026-08-15 ok
cloud.mediamarkt.lu 2 2025-08-07 2026-07-30 ok
service.mediamarkt.lu 1 2026-06-02 2026-06-02 ok
servicedereprise.mediamarkt.lu 5 2026-04-27 2026-08-28 ok
cloud-auth.mediamarkt.lu 2 2025-08-07 2026-07-30 ok
www.mediamarkt.lu 15 2026-05-25 2026-10-03 ok
delivery.mediamarkt.lu 2 2026-07-03 2026-08-25 ok

Programmatic access, with DNS A records: API GET /v1/hosts/mediamarkt.lu (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/mediamarkt.lu.