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.

5 hosts · 164 ms

HostCertsFirst seenLast seen
vissel-kobe.co.jp 3 2025-09-12 2026-08-30
*.vissel-kobe.co.jp 3 2025-09-12 2026-08-30
school.vissel-kobe.co.jp 1 2025-11-19 2025-11-19
manager.vissel-kobe.co.jp 1 2025-07-30 2025-07-30
www.vissel-kobe.co.jp 1 2025-12-03 2025-12-03

Programmatic access: API GET /v1/hosts/vissel-kobe.co.jp (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/vissel-kobe.co.jp.