Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

11 hosts · 346 ms

HostCertsFirst seenLast seenDNS
batonz.jp 4 2025-07-25 2026-08-28 ok
*.batonz.jp 4 2025-07-02 2026-08-28 —
conference.batonz.jp 66 2026-05-14 2026-09-28 ok
shokokai.batonz.jp 3 2026-04-23 2026-09-23 ok
shoukei.batonz.jp 2 2026-02-24 2026-07-12 ok
form.batonz.jp 53 2026-05-17 2026-09-18 ok
shinkin.batonz.jp 1 2025-11-20 2025-11-20 ok
banks.batonz.jp 2 2025-10-13 2026-09-12 ok
event.batonz.jp 13 2026-05-21 2026-09-16 ok
www.event.batonz.jp 10 2026-05-22 2026-09-17 ok
support.batonz.jp 5 2026-05-26 2026-09-23 ok

Programmatic access, with DNS A records: API GET /v1/hosts/batonz.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/batonz.jp.