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 · 230 ms

HostCertsFirst seenLast seenDNS
puertocoronel.cl 3 2025-08-14 2026-09-11 ok
*.puertocoronel.cl 3 2025-08-14 2026-09-11 —
mta-sts.puertocoronel.cl 4 2026-04-12 2026-08-10 ok

Programmatic access, with DNS A records: API GET /v1/hosts/puertocoronel.cl (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/puertocoronel.cl.