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.

5 hosts · 315 ms

HostCertsFirst seenLast seenDNS
benchclearers.com 17 2026-05-16 2026-09-26 ok
email.benchclearers.com 12 2026-05-21 2026-10-01 ok
pysfn.benchclearers.com 6 2026-07-15 2026-09-12 ok
account.benchclearers.com 9 2026-04-22 2026-08-30 ok
www.benchclearers.com 15 2026-05-16 2026-09-25 ok

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