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 · 306 ms

HostCertsFirst seenLast seenDNS
dataray.com 20 2025-06-13 2026-09-25 ok
*.dataray.com 17 2025-06-13 2026-09-25 —
acumatica.dataray.com 1 2026-09-15 2026-09-15 ok
kb.dataray.com 7 2026-06-16 2026-09-24 ok
store.dataray.com 1 2026-06-05 2026-06-05 ok
www.store.dataray.com 11 2026-05-28 2026-09-23 ok
assets-cn.dataray.com 1 2025-11-19 2025-11-19 ok
assets.dataray.com 2 2025-08-06 2026-07-07 ok
www.dataray.com 3 2026-06-05 2026-08-14 ok

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