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.

2 hosts · 151 ms

HostCertsFirst seenLast seen
soynu.com.co 2 2025-10-09 2026-09-08
*.soynu.com.co 2 2025-10-09 2026-09-08

Programmatic access: API GET /v1/hosts/soynu.com.co (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/soynu.com.co.