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 · 287 ms

HostCertsFirst seenLast seen
brewbound.com 8 2025-12-15 2026-09-16
auth.brewbound.com 1 2026-02-09 2026-02-09
win.brewbound.com 8 2026-05-01 2026-08-27
app.brewbound.com 8 2025-12-21 2026-09-16
jobs.brewbound.com 3 2025-10-15 2026-09-15
account.brewbound.com 2 2026-02-22 2026-07-10
www.brewbound.com 12 2025-12-15 2026-09-16

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