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 · 195 ms

HostCertsFirst seenLast seenDNS
scottandassociates-pc.com 14 2026-05-05 2026-09-24 ok
*.scottandassociates-pc.com 14 2026-05-05 2026-09-24 —
sandbox.scottandassociates-pc.com 2 2026-06-08 2026-06-08 ok

Programmatic access, with DNS A records: API GET /v1/hosts/scottandassociates-pc.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/scottandassociates-pc.com.