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.

5 hosts · 233 ms

HostCertsFirst seenLast seen
baguit.com 21 2026-04-21 2026-10-04
*.baguit.com 10 2026-05-14 2026-10-04
nonprod-test.baguit.com 2 2025-10-22 2025-10-22
www.nonprod-test.baguit.com 2 2025-10-22 2025-10-22
www.baguit.com 10 2026-04-21 2026-08-18

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