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.

4 hosts · 275 ms

HostCertsFirst seenLast seenDNS
acordocerto.com.br 14 2025-08-21 2026-08-15 ok
*.acordocerto.com.br 14 2025-08-21 2026-08-15 —
ac-wp-blog-lb.acordocerto.com.br 2 2025-07-21 2026-06-21 ok
ac-wp-blog-lb-dev.acordocerto.com.br 2 2025-08-18 2026-07-19 ok

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