Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

4 hosts · 355 ms

HostCertsFirst seenLast seenDNS
gmo-ps.com 1 2025-09-19 2025-09-19 nodata
cdn.gmo-ps.com 1 2025-10-31 2025-10-31 ok
corp-appgw.gmo-ps.com 1 2026-03-13 2026-03-13 ok
www.gmo-ps.com 1 2025-09-19 2025-09-19 ok

Programmatic access, with DNS A records: API GET /v1/hosts/gmo-ps.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/gmo-ps.com.