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.

7 hosts · 236 ms

HostCertsFirst seenLast seen
public69.com 23 2026-04-13 2026-10-05
*.public69.com 18 2026-04-13 2026-09-26
db.public69.com 4 2026-06-09 2026-10-08
staging.public69.com 5 2026-04-29 2026-08-28
cdn-staging.public69.com 1 2026-02-12 2026-02-12
mysql.public69.com 5 2026-04-29 2026-08-28
cdn.public69.com 2 2026-03-28 2026-08-28

Programmatic access: API GET /v1/hosts/public69.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/public69.com.