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 · 214 ms

HostCertsFirst seenLast seen
kdreams.jp 1 2026-02-06 2026-02-06
*.kdreams.jp 1 2026-02-06 2026-02-06
info2.kdreams.jp 7 2025-12-03 2026-09-06
ma.kdreams.jp 1 2026-02-06 2026-02-06
*.ma.kdreams.jp 1 2026-02-06 2026-02-06
api.kdreams.jp 2 2026-04-01 2026-10-02
*.api.kdreams.jp 2 2026-04-01 2026-10-02
campaign.kdreams.jp 3 2026-04-07 2026-10-02
in.kdreams.jp 1 2026-02-06 2026-02-06
*.in.kdreams.jp 1 2026-02-06 2026-02-06
keirin.kdreams.jp 1 2025-12-26 2025-12-26
*.keirin.kdreams.jp 1 2025-12-26 2025-12-26
cn.keirin.kdreams.jp 4 2026-05-04 2026-10-04
in.keirin.kdreams.jp 1 2026-01-26 2026-01-26
*.in.keirin.kdreams.jp 1 2026-01-26 2026-01-26
my.keirin.kdreams.jp 1 2026-01-26 2026-01-26
*.my.keirin.kdreams.jp 1 2026-01-26 2026-01-26
my.kdreams.jp 1 2026-02-06 2026-02-06
*.my.kdreams.jp 1 2026-02-06 2026-02-06

Programmatic access: API GET /v1/hosts/kdreams.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/kdreams.jp.