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.

6 hosts · 323 ms

HostCertsFirst seenLast seenDNS
conoha.jp 2 2025-09-22 2026-09-25 ok
*.conoha.jp 2 2025-09-22 2026-09-25 —
a8clk.manage.conoha.jp 7 2026-05-18 2026-09-15 ok
cp.conoha.jp 2 2025-07-03 2026-07-06 ok
*.cp.conoha.jp 2 2025-07-03 2026-07-06 —
sandbox.conoha.jp 1 2026-09-03 2026-09-03 ok

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