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 · 315 ms

HostCertsFirst seenLast seenDNS
robertwalters.com.au 2 2025-09-01 2026-08-19 ok
payrollsolution.robertwalters.com.au 2 2025-06-16 2026-01-12 ok
www.robertwalters.com.au 2 2025-09-01 2026-08-19 ok
capability.robertwalters.com.au 2 2025-06-16 2026-01-12 ok

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