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 · 284 ms

HostCertsFirst seenLast seenDNS
nordnet.de 5 2026-05-24 2026-09-21 ok
beta.nordnet.de 3 2026-05-30 2026-09-14 ok
link.nordnet.de 5 2026-05-31 2026-09-17 ok
tunnel.nordnet.de 2 2026-06-04 2026-06-04 ok
analytics.nordnet.de 3 2026-05-22 2026-09-06 ok
files.nordnet.de 4 2026-06-04 2026-09-23 ok
link.notifications.nordnet.de 1 2026-10-02 2026-10-02 ok
www.nordnet.de 3 2026-05-26 2026-09-15 ok

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