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.

3 hosts · 326 ms

HostCertsFirst seenLast seenDNS
orbis.run 12 2026-05-25 2026-09-10 ok
*.orbis.run 2 2026-05-25 2026-05-25 —
www.orbis.run 10 2026-06-14 2026-09-10 ok

Programmatic access, with DNS A records: API GET /v1/hosts/orbis.run (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/orbis.run.