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 · 394 ms

HostCertsFirst seenLast seenDNS
global-studio.gmo 11 2026-05-15 2026-09-17 ok
*.global-studio.gmo 11 2026-05-15 2026-09-17 —
web.global-studio.gmo 4 2026-05-20 2026-07-19 ok
www.global-studio.gmo 1 2025-11-21 2025-11-21 ok

Programmatic access, with DNS A records: API GET /v1/hosts/global-studio.gmo (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/global-studio.gmo.