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 · 295 ms

HostCertsFirst seenLast seen
img.mail.info-synergie.fr 10 2026-06-05 2026-10-01
r.mail.info-synergie.fr 3 2026-06-16 2026-09-05
jenelesavaispas.info-synergie.fr 12 2026-05-12 2026-09-07
jelesavais.info-synergie.fr 10 2026-05-10 2026-09-05

Programmatic access: API GET /v1/hosts/info-synergie.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/info-synergie.fr.