Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

5 hosts · 229 ms

HostCertsFirst seenLast seen
norrona.no 10 2026-06-16 2026-08-15
*.norrona.no 10 2026-06-16 2026-08-15
klrfdjg8-2.norrona.no 28 2026-05-02 2026-08-01
handbook.norrona.no 4 2026-04-25 2026-10-09
portal.norrona.no 3 2026-05-02 2026-08-20

Programmatic access: API GET /v1/hosts/norrona.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/norrona.no.