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 · 281 ms

HostCertsFirst seenLast seen
teatronacional.go.cr 19 2025-06-19 2026-09-21
*.teatronacional.go.cr 19 2025-06-19 2026-09-21
boleteria.teatronacional.go.cr 2 2025-09-19 2026-10-08
soporte.teatronacional.go.cr 4 2026-04-13 2026-08-11

Programmatic access: API GET /v1/hosts/teatronacional.go.cr (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/teatronacional.go.cr.