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.

9 hosts · 305 ms

HostCertsFirst seenLast seenDNS
myfloridacfo.com 2 2025-07-28 2026-07-27 ok
*.myfloridacfo.com 2 2025-07-24 2026-06-24 —
sf01.myfloridacfo.com 1 2026-01-06 2026-01-06 ok
maintenance.myfloridacfo.com 1 2025-12-08 2025-12-08 ok
financeyourfuture.myfloridacfo.com 2 2025-06-16 2026-06-18 ok
flvendor.myfloridacfo.com 1 2026-01-27 2026-01-27 ok
cfophotos.myfloridacfo.com 7 2026-03-18 2026-08-26 ok
ccrs.myfloridacfo.com 1 2026-01-26 2026-01-26 nxdomain
www.myfloridacfo.com 2 2025-07-28 2026-07-27 ok

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