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.

6 hosts · 270 ms

HostCertsFirst seenLast seenDNS
cv.fr 2 2025-11-10 2025-11-11 ok
*.cv.fr 2 2025-08-21 2026-07-22 —
link.cv.fr 1 2025-11-10 2025-11-10 ok
icu.cv.fr 2 2025-12-17 2025-12-17 ok
preview-icu.cv.fr 1 2025-12-17 2025-12-17 ok
www.cv.fr 2 2025-11-10 2025-11-11 ok

Programmatic access, with DNS A records: API GET /v1/hosts/cv.fr (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.fr.