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.

4 hosts · 224 ms

HostCertsFirst seenLast seen
terralabs.com 24 2026-04-28 2026-08-26
*.stage.terralabs.com 3 2025-11-19 2025-11-19
vpn-server.stage.terralabs.com 5 2025-07-27 2026-06-27
www.terralabs.com 5 2026-05-08 2026-09-04

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