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.

11 hosts · 306 ms

HostCertsFirst seenLast seenDNS
fiken.no 42 2026-04-25 2026-09-30 ok
*.fiken.no 42 2026-04-25 2026-09-30 —
plussiboard.fiken.no 3 2026-06-11 2026-08-12 ok
blogg.fiken.no 6 2026-06-18 2026-09-26 ok
helpdesk.fiken.no 11 2026-05-22 2026-09-18 ok
starte-as.fiken.no 3 2026-05-07 2026-08-24 ok
*.starte-as.fiken.no 3 2026-05-07 2026-08-24 —
analytics.fiken.no 5 2026-05-06 2026-09-09 ok
kurs.fiken.no 10 2026-05-07 2026-09-02 ok
epost.fiken.no 7 2026-05-04 2026-09-01 ok
kompott.fiken.no 6 2026-05-28 2026-10-01 ok

Programmatic access, with DNS A records: API GET /v1/hosts/fiken.no (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/fiken.no.