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 · 402 ms

HostCertsFirst seenLast seenDNS
nuovapatavium.com 7 2026-01-17 2026-09-07 ok
*.nuovapatavium.com 1 2026-01-17 2026-01-17 —
mail.nuovapatavium.com 4 2026-05-30 2026-05-30 ok
www.nuovapatavium.com 6 2026-06-20 2026-09-07 ok

Programmatic access, with DNS A records: API GET /v1/hosts/nuovapatavium.com (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/nuovapatavium.com.