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.

7 hosts · 291 ms

HostCertsFirst seenLast seenDNS
parsonsbehle.com 11 2026-02-07 2026-09-22 ok
*.parsonsbehle.com 7 2026-02-12 2026-02-13 —
estateplanning.parsonsbehle.com 4 2026-04-13 2026-08-13 ok
icompli.parsonsbehle.com 4 2026-02-19 2026-10-03 ok
alumni.parsonsbehle.com 4 2026-04-14 2026-08-16 ok
lift.parsonsbehle.com 4 2026-04-14 2026-08-16 ok
www.parsonsbehle.com 3 2026-02-07 2026-09-22 ok

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