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 · 292 ms

HostCertsFirst seenLast seenDNS
familycarefc.com 5 2026-06-06 2026-08-07 ok
familycarefc-pa.familycarefc.com 2 2026-01-03 2026-01-14 ok
www.familycarefc-pa.familycarefc.com 2 2026-01-03 2026-01-14 nxdomain
familycarefc-asa.familycarefc.com 1 2025-10-16 2025-10-16 nxdomain
www.familycarefc-asa.familycarefc.com 1 2025-10-16 2025-10-16 nxdomain
familycarefc-pa-bu.familycarefc.com 1 2026-01-03 2026-01-03 nxdomain
familcarefc-asa-bu.familycarefc.com 1 2026-01-03 2026-01-03 nxdomain
familycarefc-asa-bu.familycarefc.com 1 2026-01-03 2026-01-03 nxdomain
www.familycarefc.com 2 2026-06-07 2026-08-08 ok
felix.familycarefc.com 4 2026-02-04 2026-09-24 ok

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