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.

8 hosts · 329 ms

HostCertsFirst seenLast seenDNS
brasfort.com.br 3 2025-09-06 2026-08-21 ok
*.brasfort.com.br 2 2025-09-06 2026-08-21 —
correio.brasfort.com.br 1 2026-05-13 2026-05-13 ok
pro.brasfort.com.br 6 2026-05-08 2026-10-04 ok
braszap.brasfort.com.br 5 2026-05-24 2026-09-21 ok
autodiscover.brasfort.com.br 1 2026-05-13 2026-05-13 ok
dms.brasfort.com.br 4 2026-04-25 2026-04-25 ok
www.brasfort.com.br 1 2026-05-13 2026-05-13 ok

Programmatic access, with DNS A records: API GET /v1/hosts/brasfort.com.br (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/brasfort.com.br.