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 · 299 ms

HostCertsFirst seenLast seenDNS
gmotech.jp 1 2026-05-12 2026-05-12 ok
ma.gmotech.jp 9 2026-04-19 2026-09-15 ok
hd.gmotech.jp 3 2025-08-08 2025-12-18 ok
stg.hd.gmotech.jp 3 2025-08-22 2026-07-23 ok
origin-stg.hd.gmotech.jp 2 2025-08-25 2026-07-26 nxdomain
dev.hd.gmotech.jp 2 2025-10-08 2026-09-08 ok
blog.gmotech.jp 1 2025-10-07 2025-10-07 ok
yutai.gmotech.jp 1 2026-01-23 2026-01-23 nodata
stafftool.yutai.gmotech.jp 1 2026-04-27 2026-04-27 nxdomain

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