Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

4 hosts · 256 ms

HostCertsFirst seenLast seen
id.e-shishobako.ne.jp 4 2025-06-10 2026-08-31
*.id.e-shishobako.ne.jp 2 2025-06-10 2026-05-22
test1.id.e-shishobako.ne.jp 2 2025-10-06 2026-08-31
stg.id.e-shishobako.ne.jp 2 2025-10-06 2026-08-31

Programmatic access: API GET /v1/hosts/id.e-shishobako.ne.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/id.e-shishobako.ne.jp.