Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

3 hosts · 278 ms

HostCertsFirst seenLast seen
marketing.sounu.com.br 1 2025-07-23 2025-07-23
nubank.sounu.com.br 4 2025-10-23 2026-09-22
*.nubank.sounu.com.br 4 2025-10-23 2026-09-22

Programmatic access: API GET /v1/hosts/sounu.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/sounu.com.br.