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.

7 hosts · 225 ms

HostCertsFirst seenLast seen
shapingnewtomorrow.dk 13 2026-05-16 2026-09-27
cookie.shapingnewtomorrow.dk 2 2025-07-16 2026-06-15
ssgtm.shapingnewtomorrow.dk 3 2026-05-19 2026-09-01
do.shapingnewtomorrow.dk 4 2026-05-21 2026-07-20
returns.shapingnewtomorrow.dk 12 2025-09-16 2026-09-10
www.returns.shapingnewtomorrow.dk 2 2025-09-16 2026-09-04
www.shapingnewtomorrow.dk 13 2026-05-15 2026-09-24

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