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 · 231 ms

HostCertsFirst seenLast seenDNS
gamma.amazon.jobs 1 2025-11-10 2025-11-10 ok
prod.gamma.amazon.jobs 2 2025-09-17 2026-08-18 ok
origin.gamma.amazon.jobs 4 2025-10-17 2025-11-11 ok

Programmatic access, with DNS A records: API GET /v1/hosts/gamma.amazon.jobs (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/gamma.amazon.jobs.