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.

6 hosts · 241 ms

HostCertsFirst seenLast seen
cv.nl 2 2025-11-11 2025-11-11
*.cv.nl 1 2025-11-09 2025-11-09
link.cv.nl 1 2025-11-10 2025-11-10
icu.cv.nl 6 2025-11-04 2026-10-05
preview-icu.cv.nl 4 2025-11-04 2026-10-05
www.cv.nl 2 2025-11-11 2025-11-11

Programmatic access: API GET /v1/hosts/cv.nl (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/cv.nl.