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.

4 hosts · 293 ms

HostCertsFirst seenLast seenDNS
cloud.mail.shiseido-ginzatokyo.jp 2 2026-08-28 2026-08-28 ok
image.mail.shiseido-ginzatokyo.jp 20 2026-08-28 2026-09-30 ok
click.mail.shiseido-ginzatokyo.jp 2 2026-08-28 2026-08-28 ok
view.mail.shiseido-ginzatokyo.jp 2 2026-08-28 2026-08-28 ok

Programmatic access, with DNS A records: API GET /v1/hosts/mail.shiseido-ginzatokyo.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/mail.shiseido-ginzatokyo.jp.