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.

4 hosts · 333 ms

HostCertsFirst seenLast seen
sogolytics-marketing.com 4 2026-03-31 2026-09-15
img1fbc9.sogolytics-marketing.com 1 2026-08-20 2026-08-20
mc.sogolytics-marketing.com 1 2026-08-20 2026-08-20
www.sogolytics-marketing.com 4 2026-03-31 2026-09-15

Programmatic access: API GET /v1/hosts/sogolytics-marketing.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/sogolytics-marketing.com.