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.

7 hosts · 319 ms

HostCertsFirst seenLast seenDNS
mediamarkt.com 3 2026-04-26 2026-08-10 ok
feedback.mediamarkt.com 2 2026-06-17 2026-06-19 ok
dq.mediamarkt.com 2 2025-09-09 2026-08-14 ok
www.mediamarkt.com 3 2026-04-26 2026-08-10 ok
service-mail.my.mediamarkt.com 3 2026-03-19 2026-09-15 ok
service-mailer.my.mediamarkt.com 1 2026-01-20 2026-01-20 ok
delivery.mediamarkt.com 2 2026-07-03 2026-08-25 ok

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