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 · 235 ms

HostCertsFirst seenLast seenDNS
fundacionpopular.org 44 2025-09-23 2026-10-02 ok
*.fundacionpopular.org 41 2026-02-12 2026-10-02 —
www.fundacionpopular.org 2 2025-09-23 2025-09-24 ok

Programmatic access, with DNS A records: API GET /v1/hosts/fundacionpopular.org (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/fundacionpopular.org.