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.

17 hosts · 221 ms

HostCertsFirst seenLast seen
nu.com.co 13 2025-06-21 2026-09-10
*.nu.com.co 20 2025-06-21 2026-09-17
comunidad.nu.com.co 5 2026-05-29 2026-09-26
recommend.nu.com.co 1 2026-01-24 2026-01-24
data-plane-01.avalanche.nu.com.co 3 2025-09-22 2026-08-23
*.data-plane-01.avalanche.nu.com.co 3 2025-09-22 2026-08-23
control-plane-01.avalanche.nu.com.co 2 2026-08-12 2026-08-12
*.control-plane-01.avalanche.nu.com.co 2 2026-08-12 2026-08-12
prod-waf.nu.com.co 22 2026-05-09 2026-09-25
*.prod-waf.nu.com.co 22 2026-05-09 2026-09-25
staging-waf.nu.com.co 8 2026-05-09 2026-09-05
*.staging-waf.nu.com.co 8 2026-05-09 2026-09-05
email.building.nu.com.co 5 2026-05-18 2026-09-15
blog.nu.com.co 4 2026-05-27 2026-09-28
www.blog.nu.com.co 3 2026-05-08 2026-09-09
content.nu.com.co 1 2025-12-02 2025-12-02
*.staging-www.nu.com.co 2 2026-04-10 2026-09-10

Programmatic access: API GET /v1/hosts/nu.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/nu.com.co.