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.

6 hosts · 219 ms

HostCertsFirst seenLast seen
shop-pro.jp 1 2026-02-13 2026-02-13
*.shop-pro.jp 1 2026-02-13 2026-02-13
help.shop-pro.jp 8 2026-05-08 2026-08-20
pepper.shop-pro.jp 10 2026-05-28 2026-09-25
*.pepper.shop-pro.jp 10 2026-05-28 2026-09-25
agency.shop-pro.jp 8 2026-05-08 2026-08-20

Programmatic access: API GET /v1/hosts/shop-pro.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/shop-pro.jp.