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.

9 hosts · 219 ms

HostCertsFirst seenLast seenDNS
*.eugrid.co.jp 2 2026-03-02 2026-07-18 —
aa.eugrid.co.jp 2 2026-03-15 2026-08-15 ok
cloud.eugrid.co.jp 9 2026-04-26 2026-09-02 ok
dmk.eugrid.co.jp 2 2026-03-03 2026-07-19 ok
docs.eugrid.co.jp 6 2026-05-02 2026-08-27 ok
kagayakiaudit.eugrid.co.jp 3 2026-05-03 2026-10-03 ok
emberpoint.eugrid.co.jp 1 2025-09-07 2025-09-07 nxdomain
support.eugrid.co.jp 5 2026-04-29 2026-08-27 ok
chibauniversity.eugrid.co.jp 2 2025-09-21 2026-08-22 ok

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