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.

5 hosts · 593 ms

HostCertsFirst seenLast seenDNS
moonshot.com 35 2026-05-23 2026-10-03 ok
*.moonshot.com 24 2026-05-23 2026-10-03 —
support.moonshot.com 11 2026-06-03 2026-09-29 ok
www.moonshot.com 11 2026-05-23 2026-09-19 ok
*.www.moonshot.com 11 2026-05-23 2026-09-19 —

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