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.

12 hosts · 249 ms

HostCertsFirst seenLast seenDNS
moppy.jp 4 2025-09-29 2026-09-19 ok
*.moppy.jp 4 2025-09-29 2026-09-19 —
cloud.mc.moppy.jp 1 2025-09-30 2025-09-30 servfail
image.mc.moppy.jp 2 2025-12-31 2026-01-29 ok
click.mc.moppy.jp 1 2025-09-27 2025-09-27 nxdomain
view.mc.moppy.jp 1 2025-09-27 2025-09-27 nxdomain
*.pc.moppy.jp 2 2026-04-19 2026-09-19 —
ssl.pc.moppy.jp 1 2025-09-30 2025-09-30 ok
www.ssl.pc.moppy.jp 1 2025-09-30 2025-09-30 ok
*.manage.moppy.jp 3 2026-07-13 2026-09-11 —
ep-click.moppy.jp 1 2026-01-05 2026-01-05 ok
investigation.moppy.jp 4 2026-04-14 2026-08-12 ok

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