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.

15 hosts · 280 ms

HostCertsFirst seenLast seenDNS
nordnet.dk 3 2025-08-28 2026-09-08 ok
retail-web.nordnet.dk 2 2026-05-06 2026-07-01 ok
public.nordnet.dk 7 2025-08-25 2026-08-18 ok
nneid.nordnet.dk 5 2026-04-22 2026-08-20 ok
blog.nordnet.dk 10 2026-04-23 2026-09-07 ok
*.blog.nordnet.dk 8 2026-04-23 2026-06-21 —
link.nordnet.dk 3 2026-05-05 2026-08-19 ok
tunnel.nordnet.dk 6 2025-09-22 2026-08-18 ok
partner.nordnet.dk 5 2026-04-16 2026-09-29 ok
analytics.nordnet.dk 3 2026-05-18 2026-09-02 ok
files.nordnet.dk 3 2026-05-19 2026-09-03 ok
link.notifications.nordnet.dk 1 2026-10-02 2026-10-02 ok
events.nordnet.dk 5 2025-09-24 2026-09-08 ok
nneid-test.nordnet.dk 4 2026-04-20 2026-08-19 ok
www.nordnet.dk 5 2025-08-28 2026-09-13 ok

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