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.

9 hosts · 296 ms

HostCertsFirst seenLast seenDNS
gmofh.com 1 2025-12-04 2025-12-04 nodata
*.gmofh.com 4 2025-12-31 2026-08-15 —
maintenance.gmofh.com 1 2025-12-04 2025-12-04 ok
yutai.gmofh.com 1 2025-12-04 2025-12-04 nodata
fs-vietnam.gmofh.com 5 2026-04-22 2026-08-16 ok
cdn.gmofh.com 1 2025-12-04 2025-12-04 ok
stg-cdn.gmofh.com 1 2025-12-04 2025-12-04 ok
www.gmofh.com 1 2025-12-04 2025-12-04 ok
stg-www.gmofh.com 1 2025-12-04 2025-12-04 ok

Programmatic access, with DNS A records: API GET /v1/hosts/gmofh.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/gmofh.com.