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 · 255 ms

HostCertsFirst seenLast seenDNS
nine-pine.com 16 2026-04-12 2026-09-27 ok
*.nine-pine.com 4 2026-04-12 2026-08-11 —
www.nine-pine.com 16 2026-05-18 2026-09-29 ok

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