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.

9 hosts · 175 ms

HostCertsFirst seenLast seen
sinvestir.fr 23 2026-04-29 2026-10-04
*.sinvestir.fr 18 2026-05-09 2026-10-04
espace.sinvestir.fr 4 2026-04-18 2026-08-15
auth.sinvestir.fr 10 2026-05-01 2026-08-28
img.mail.sinvestir.fr 2 2026-08-12 2026-08-12
r.mail.sinvestir.fr 1 2026-08-12 2026-08-12
conseil.sinvestir.fr 4 2026-04-13 2026-08-11
simulateurs.sinvestir.fr 5 2026-05-07 2026-09-09
www.sinvestir.fr 5 2026-04-29 2026-08-27

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