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 · 247 ms

HostCertsFirst seenLast seen
greenoaks.com 31 2026-04-19 2026-09-27
*.greenoaks.com 25 2026-04-19 2026-09-27
charlotte.greenoaks.com 5 2026-04-26 2026-08-27
staging.greenoaks.com 3 2026-06-18 2026-08-27
email.greenoaks.com 1 2026-09-15 2026-09-15
www.greenoaks.com 5 2026-05-11 2026-09-12

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