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.

3 hosts · 288 ms

HostCertsFirst seenLast seenDNS
bathspacapital.com 13 2026-05-17 2026-09-28 ok
www.bathspacapital.com 13 2026-05-18 2026-09-25 ok
pay.bathspacapital.com 5 2026-05-19 2026-09-22 ok

Programmatic access, with DNS A records: API GET /v1/hosts/bathspacapital.com (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/bathspacapital.com.