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.

9 hosts · 192 ms

HostCertsFirst seenLast seen
dnb.dk 9 2025-08-27 2026-08-26
www-s51.dnb.dk 3 2025-08-27 2026-09-25
www-a1.dnb.dk 3 2025-08-27 2026-09-25
www-s52.dnb.dk 3 2025-08-27 2026-09-25
www-a2.dnb.dk 3 2025-08-27 2026-09-25
www-s53.dnb.dk 3 2025-08-27 2026-09-25
www-a3.dnb.dk 3 2025-08-27 2026-09-25
mta-sts.dnb.dk 3 2025-10-22 2026-09-25
www.dnb.dk 9 2025-08-27 2026-08-26

Programmatic access: API GET /v1/hosts/dnb.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/dnb.dk.