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.

13 hosts · 272 ms

Download CSV
HostCertsFirst seenLast seen
shield.com 56 2025-07-29 2026-10-16
*.shield.com 49 2025-07-11 2026-10-09
alpha.shield.com 9 2026-05-28 2026-09-24
beta.shield.com 10 2026-05-28 2026-09-23
testguide.shield.com 8 2026-05-14 2026-09-09
google-testguide.shield.com 11 2026-05-30 2026-09-25
jktu65tgh.ap-southeast-3.clickhouse.shield.com 2 2025-07-29 2026-06-29
poc-gate.shield.com 8 2026-09-16 2026-10-16
*.poc-gate.shield.com 8 2026-09-16 2026-10-16
landing.shield.com 8 2026-05-07 2026-09-02
trust.shield.com 7 2026-05-18 2026-09-13
www.shield.com 9 2026-05-28 2026-09-23
websandbox.shield.com 11 2026-05-23 2026-09-18

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