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.pt 4 2026-03-06 2026-09-08
suporte.juul.pt 4 2026-03-06 2026-09-08
support.juul.pt 2 2026-03-06 2026-08-06
www.juul.pt 4 2026-03-06 2026-09-08

Programmatic access: API GET /v1/hosts/juul.pt (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.pt.