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 · 288 ms

HostCertsFirst seenLast seen
kpcb.com 16 2026-04-22 2026-09-25
*.kpcb.com 16 2026-04-22 2026-09-25
login.kpcb.com 9 2026-04-13 2026-09-15
jobs.kpcb.com 8 2026-05-17 2026-09-25

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