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.

3 hosts · 418 ms

HostCertsFirst seenLast seen
relation-client-edf.fr 3 2025-11-06 2026-06-22
r7.relation-client-edf.fr 2 2025-07-15 2026-06-22
pp.relation-client-edf.fr 2 2025-07-15 2026-06-22

Programmatic access: API GET /v1/hosts/relation-client-edf.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/relation-client-edf.fr.