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.

4 hosts · 245 ms

Download CSV
HostCertsFirst seenLast seen
juul.fr 5 2025-10-28 2026-09-28
*.juul.fr 2 2025-10-28 2026-09-28
support.juul.fr 4 2026-02-24 2026-09-15
www.juul.fr 5 2025-10-28 2026-09-28

Programmatic access: API GET /v1/hosts/juul.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/juul.fr.