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.

8 hosts · 236 ms

HostCertsFirst seenLast seen
samscreen.com 26 2026-04-12 2026-09-30
*.samscreen.com 10 2026-04-12 2026-08-18
staging.samscreen.com 4 2026-06-15 2026-08-03
webdisk.samscreen.com 2 2026-09-30 2026-09-30
cpanel.samscreen.com 2 2026-09-30 2026-09-30
mail.samscreen.com 4 2026-09-30 2026-09-30
mta-sts.samscreen.com 3 2026-04-21 2026-06-20
www.samscreen.com 15 2026-05-13 2026-09-30

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