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 · 195 ms

HostCertsFirst seenLast seenDNS
gianta.com.au 9 2026-04-20 2026-08-22 ok
*.gianta.com.au 9 2026-04-20 2026-08-22 —
www.gianta.com.au 5 2026-05-28 2026-09-25 ok

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