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.

6 hosts · 290 ms

HostCertsFirst seenLast seen
email.scoresense.com 12 2026-05-03 2026-08-29
*.email.scoresense.com 12 2026-05-03 2026-08-29
image.email.scoresense.com 3 2026-01-21 2026-09-21
click.email.scoresense.com 1 2026-01-15 2026-01-15
pages.email.scoresense.com 1 2026-01-15 2026-01-15
view.email.scoresense.com 1 2026-01-15 2026-01-15

Programmatic access: API GET /v1/hosts/email.scoresense.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/email.scoresense.com.