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.

3 hosts · 342 ms

HostCertsFirst seenLast seen
permanentequity.com 5 2026-05-11 2026-09-03
orbit.permanentequity.com 5 2026-04-17 2026-10-10
www.permanentequity.com 5 2026-05-19 2026-09-06

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