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.

15 hosts · 221 ms

HostCertsFirst seenLast seenDNS
housfy.com 4 2025-08-16 2026-08-31 ok
*.housfy.com 5 2025-08-16 2026-08-31 —
bc.housfy.com 2 2025-09-23 2025-11-17 ok
www.bc.housfy.com 2 2025-09-23 2025-11-17 nxdomain
*.multisite.housfy.com 1 2026-09-22 2026-09-22 —
n8n-confidential.housfy.com 1 2026-03-20 2026-03-20 ok
*.admin.housfy.com 2 2025-07-10 2026-06-08 —
valoracion.housfy.com 1 2026-01-19 2026-01-19 ok
vpn.housfy.com 4 2026-05-21 2026-08-28 ok
jobs.housfy.com 8 2026-05-01 2026-08-27 ok
*.sys.housfy.com 1 2026-06-20 2026-06-20 —
*.ztna.kernel.sys.housfy.com 1 2026-06-20 2026-06-20 —
controller.ztna.kernel.sys.housfy.com 3 2026-07-08 2026-08-28 ok
pre-controller.ztna.kernel.sys.housfy.com 1 2026-08-28 2026-08-28 ok
pro-controller.ztna.kernel.sys.housfy.com 1 2026-10-05 2026-10-05 ok

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