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.

4 hosts · 298 ms

HostCertsFirst seenLast seenDNS
pozescaf.com 7 2025-07-15 2026-09-28 ok
genome.pozescaf.com 10 2026-05-15 2026-09-24 ok
app.pozescaf.com 5 2026-05-28 2026-09-25 ok
www.pozescaf.com 7 2025-07-15 2026-09-28 ok

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