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.

3 hosts · 258 ms

HostCertsFirst seenLast seenDNS
novagne.com.br 3 2025-11-05 2026-07-26 ok
*.novagne.com.br 5 2025-08-30 2026-07-31 —
validaitau.novagne.com.br 1 2026-01-16 2026-01-16 ok

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