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.

19 hosts · 189 ms

HostCertsFirst seenLast seen
hokugin.co.jp 3 2026-06-18 2026-08-05
*.hokugin.co.jp 4 2025-08-21 2026-07-22
execution-ci360.hokugin.co.jp 2 2026-04-13 2026-09-13
content-ci360.hokugin.co.jp 3 2026-06-01 2026-08-06
delivery-ci360.hokugin.co.jp 5 2025-07-10 2026-08-26
cx-stg.hokugin.co.jp 1 2025-11-18 2025-11-18
*.dify-stg.hokugin.co.jp 1 2026-10-01 2026-10-01
web-appli.hokugin.co.jp 30 2026-04-30 2026-09-23
*.web-appli.hokugin.co.jp 32 2026-03-19 2026-09-23
link.hokugin.co.jp 2 2025-07-30 2026-06-30
s-link.hokugin.co.jp 2 2025-07-30 2026-06-30
econ.hokugin.co.jp 2 2026-08-24 2026-08-24
info.hokugin.co.jp 1 2026-05-18 2026-05-18
cs.hokugin.co.jp 2 2026-03-01 2026-07-12
cs-dev.hokugin.co.jp 2 2026-03-01 2026-07-12
www.hokugin.co.jp 7 2025-10-06 2026-08-05
cx.hokugin.co.jp 1 2025-11-18 2025-11-18
survey.hokugin.co.jp 5 2026-04-29 2026-09-16
*.dify.hokugin.co.jp 1 2026-10-01 2026-10-01

Programmatic access: API GET /v1/hosts/hokugin.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/hokugin.co.jp.