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.

2 hosts · 261 ms

HostCertsFirst seenLast seenDNS
sw.shiseido.co.jp 1 2026-01-23 2026-01-23 nodata
www.sw.shiseido.co.jp 1 2026-01-23 2026-01-23 nxdomain

Programmatic access, with DNS A records: API GET /v1/hosts/sw.shiseido.co.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/sw.shiseido.co.jp.