Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

10 hosts · 258 ms

HostCertsFirst seenLast seenDNS
fundkite.com 19 2026-04-22 2026-08-18 ok
*.fundkite.com 24 2026-04-22 2026-08-22 —
sandboxapr2026.fundkite.com 4 2026-04-23 2026-05-04 ok
autoconfig.fundkite.com 3 2026-07-02 2026-09-01 ok
cp.fundkite.com 5 2026-05-02 2026-08-31 ok
approvals.fundkite.com 12 2026-05-03 2026-08-29 ok
forms.fundkite.com 5 2026-05-16 2026-09-15 ok
ss.fundkite.com 5 2026-05-16 2026-09-13 ok
load.ss.fundkite.com 14 2026-05-12 2026-09-07 ok
dev.fundkite.com 2 2026-06-22 2026-06-22 ok

Programmatic access, with DNS A records: API GET /v1/hosts/fundkite.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/fundkite.com.