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.

2 hosts · 278 ms

HostCertsFirst seenLast seen
greengoldginseng.com 18 2026-04-12 2026-10-08
www.greengoldginseng.com 14 2026-04-12 2026-10-08

Programmatic access: API GET /v1/hosts/greengoldginseng.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/greengoldginseng.com.