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.

4 hosts · 297 ms

HostCertsFirst seenLast seenDNS
pleiade-consulting.fr 4 2026-04-14 2026-09-01 ok
enterpriseregistration.pleiade-consulting.fr 2 2025-11-19 2026-06-08 ok
mta-sts.pleiade-consulting.fr 5 2026-04-30 2026-08-28 ok
www.pleiade-consulting.fr 4 2026-04-14 2026-09-01 ok

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