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 · 226 ms

HostCertsFirst seenLast seenDNS
pittabaione.com 17 2026-04-21 2026-09-29 ok
*.pittabaione.com 5 2026-04-21 2026-08-28 —
www.pittabaione.com 10 2026-06-04 2026-09-30 ok

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