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.

16 hosts · 321 ms

HostCertsFirst seenLast seenDNS
nordnet.fi 3 2025-08-28 2026-09-07 ok
excsmtp2.nordnet.fi 1 2025-08-12 2025-08-12 nxdomain
retail-web.nordnet.fi 3 2026-05-02 2026-06-23 ok
public.nordnet.fi 5 2025-08-25 2026-08-18 ok
nneid.nordnet.fi 5 2026-05-09 2026-09-06 ok
blogi.nordnet.fi 6 2026-04-23 2026-09-07 ok
*.blogi.nordnet.fi 4 2026-04-23 2026-06-21 —
link.nordnet.fi 3 2026-04-28 2026-08-19 ok
tunnel.nordnet.fi 6 2025-09-22 2026-08-18 ok
partner.nordnet.fi 3 2026-05-14 2026-08-31 ok
analytics.nordnet.fi 3 2026-05-25 2026-09-11 ok
files.nordnet.fi 4 2026-06-04 2026-09-22 ok
link.notifications.nordnet.fi 1 2026-10-02 2026-10-02 ok
tapahtumat.nordnet.fi 5 2025-09-24 2026-09-11 ok
nneid-test.nordnet.fi 5 2026-05-09 2026-09-06 ok
www.nordnet.fi 5 2025-08-28 2026-09-29 ok

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