Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

3 hosts · 231 ms

HostCertsFirst seenLast seenDNS
link.suivi.contrat-es.fr 5 2026-05-03 2026-08-31 ok
link.info.contrat-es.fr 5 2026-05-02 2026-08-30 ok
conso.contrat-es.fr 1 2026-08-31 2026-08-31 ok

Programmatic access, with DNS A records: API GET /v1/hosts/contrat-es.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/contrat-es.fr.