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 · 223 ms

HostCertsFirst seenLast seen
storagesquad.com 28 2026-02-17 2026-10-04
account.storagesquad.com 5 2026-05-08 2026-09-06
test.storagesquad.com 10 2026-05-02 2026-08-28
www.storagesquad.com 30 2026-02-17 2026-10-04

Programmatic access: API GET /v1/hosts/storagesquad.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/storagesquad.com.