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 · 407 ms

HostCertsFirst seenLast seenDNS
cinereplicas.com 17 2026-05-15 2026-09-25 ok
*.cinereplicas.com 3 2026-09-20 2026-09-22 —
update.cinereplicas.com 1 2025-10-22 2025-10-22 ok
pro.cinereplicas.com 1 2025-10-22 2025-10-22 ok
container.cinereplicas.com 3 2025-10-17 2026-09-19 ok
updates.cinereplicas.com 1 2025-10-21 2025-10-21 ok
containers.cinereplicas.com 3 2025-10-17 2026-09-19 ok
product.cinereplicas.com 1 2025-10-22 2025-10-22 ok
www.cinereplicas.com 15 2026-05-15 2026-09-24 ok

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