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.

4 hosts · 256 ms

HostCertsFirst seenLast seenDNS
yachtique.it 3 2025-08-21 2026-08-24 ok
staging.yachtique.it 4 2025-09-17 2026-09-17 ok
quotation.yachtique.it 1 2026-07-31 2026-07-31 ok
www.yachtique.it 3 2025-08-21 2026-08-24 ok

Programmatic access, with DNS A records: API GET /v1/hosts/yachtique.it (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/yachtique.it.