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.

6 hosts · 285 ms

HostCertsFirst seenLast seenDNS
condenastint.com 6 2025-10-10 2026-09-10 ok
*.condenastint.com 5 2025-10-10 2026-09-10 —
workingatcni.condenastint.com 4 2026-04-17 2026-09-27 ok
link.condenastint.com 7 2026-06-03 2026-10-01 ok
support.condenastint.com 5 2026-05-07 2026-09-04 ok
supporttest.condenastint.com 5 2026-05-01 2026-08-29 ok

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