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.

5 hosts · 228 ms

HostCertsFirst seenLast seenDNS
brightstarbuddies.com.au 3 2025-06-30 2026-09-09 ok
*.brightstarbuddies.com.au 3 2025-06-30 2026-09-09 —
pipeline.brightstarbuddies.com.au 4 2026-02-04 2026-09-13 nxdomain
*.pipeline.brightstarbuddies.com.au 6 2025-08-18 2026-09-13 —
cfjump.brightstarbuddies.com.au 2 2026-05-24 2026-05-24 ok

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