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 · 283 ms

HostCertsFirst seenLast seenDNS
commodore-international.com 16 2026-04-14 2026-10-01 ok
*.commodore-international.com 8 2026-04-19 2026-10-01 —
downloads.commodore-international.com 8 2026-04-14 2026-08-10 ok
rs.commodore-international.com 4 2026-04-19 2026-08-18 ok

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