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.

11 hosts · 247 ms

HostCertsFirst seenLast seenDNS
ssltrust.com.au 3 2026-03-28 2026-10-07 ok
api.ssltrust.com.au 3 2026-03-28 2026-10-07 ok
cdn.ssltrust.com.au 3 2026-03-28 2026-10-07 ok
manager.ssltrust.com.au 3 2026-03-28 2026-10-07 ok
certmanager.ssltrust.com.au 3 2026-03-28 2026-10-07 ok
newsletter.ssltrust.com.au 13 2026-04-23 2026-10-06 ok
seals.ssltrust.com.au 10 2026-04-22 2026-10-05 ok
tools.ssltrust.com.au 9 2026-04-14 2026-09-26 ok
stats.ssltrust.com.au 10 2026-04-23 2026-10-05 ok
new.ssltrust.com.au 10 2026-04-23 2026-10-05 ok
www.ssltrust.com.au 3 2026-03-28 2026-10-07 ok

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