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 · 255 ms

HostCertsFirst seenLast seenDNS
pluspoint.tokyu.co.jp 2 2026-03-11 2026-07-27 ok
*.pluspoint.tokyu.co.jp 2 2026-03-15 2026-08-15 —
itg.pluspoint.tokyu.co.jp 4 2026-04-07 2026-09-07 ok
*.itg.pluspoint.tokyu.co.jp 3 2026-04-07 2026-09-10 —
stg.pluspoint.tokyu.co.jp 2 2026-03-11 2026-07-27 ok
*.stg.pluspoint.tokyu.co.jp 3 2026-03-15 2026-08-15 —
internal-admin.stg.pluspoint.tokyu.co.jp 3 2025-10-09 2026-09-09 nxdomain
internal-admin.pluspoint.tokyu.co.jp 2 2025-10-09 2026-09-09 nxdomain
dev.pluspoint.tokyu.co.jp 2 2026-03-11 2026-07-27 ok
*.dev.pluspoint.tokyu.co.jp 2 2026-03-11 2026-07-27 —
internal-admin.dev.pluspoint.tokyu.co.jp 5 2025-10-07 2026-09-07 nxdomain

Programmatic access, with DNS A records: API GET /v1/hosts/pluspoint.tokyu.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/pluspoint.tokyu.co.jp.