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 · 245 ms

HostCertsFirst seenLast seen
metropolegrandparis.fr 1 2026-01-26 2026-01-26
*.metropolegrandparis.fr 1 2026-01-26 2026-01-26
www.lametropolitaine.metropolegrandparis.fr 4 2026-04-21 2026-08-19
jeparticipe.metropolegrandparis.fr 18 2026-05-10 2026-09-05
portail.metropolegrandparis.fr 5 2026-05-29 2026-09-28
pastell.metropolegrandparis.fr 3 2026-05-26 2026-08-21
crm.metropolegrandparis.fr 5 2026-05-29 2026-09-28
authentification.metropolegrandparis.fr 5 2026-05-29 2026-09-28
numeriquepourtous.metropolegrandparis.fr 10 2026-06-07 2026-10-05

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