Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

3 hosts · 160 ms

HostCertsFirst seenLast seen
cx.oneteam.truist.com 1 2026-01-26 2026-01-26
app.cx.oneteam.truist.com 1 2026-01-26 2026-01-26
images.cx.oneteam.truist.com 1 2026-01-29 2026-01-29

Programmatic access: API GET /v1/hosts/cx.oneteam.truist.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/cx.oneteam.truist.com.