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.

6 hosts · 240 ms

HostCertsFirst seenLast seenDNS
torrero.com 17 2026-04-25 2026-10-04 ok
*.torrero.com 11 2026-04-25 2026-10-04 —
tracking.torrero.com 3 2026-07-09 2026-09-23 ok
docs.torrero.com 14 2026-04-13 2026-10-07 ok
status.torrero.com 5 2026-04-11 2026-10-07 ok
www.torrero.com 5 2026-05-20 2026-09-19 ok

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