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.

7 hosts · 285 ms

HostCertsFirst seenLast seen
rakuten.fr 1 2026-05-11 2026-05-11
*.rakuten.fr 1 2026-05-11 2026-05-11
financial-service.rakuten.fr 2 2025-08-26 2025-10-01
stg-financial-service.rakuten.fr 4 2025-08-26 2025-10-01
marketing.rakuten.fr 5 2026-05-19 2026-09-20
rat.rakuten.fr 3 2025-09-14 2026-08-21
member.insight.rakuten.fr 3 2026-04-02 2026-09-04

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