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 · 371 ms

HostCertsFirst seenLast seenDNS
pacificwestinjury.com 11 2026-04-18 2026-08-29 ok
email.mg.pacificwestinjury.com 4 2026-04-17 2026-08-15 ok
mta-sts.pacificwestinjury.com 4 2026-04-16 2026-08-14 ok
www.pacificwestinjury.com 11 2026-04-18 2026-08-14 ok

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