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 · 264 ms

HostCertsFirst seenLast seenDNS
shopback.com.au 34 2025-07-31 2026-09-19 ok
*.shopback.com.au 38 2025-07-31 2026-09-19 —
discover.shopback.com.au 2 2026-09-24 2026-09-24 ok
surveys.shopback.com.au 1 2025-11-30 2025-11-30 ok
support.shopback.com.au 6 2026-06-03 2026-10-01 ok

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