Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

3 hosts · 178 ms

HostCertsFirst seenLast seen
cloudoffis.com.au 3 2025-08-05 2026-08-13
*.cloudoffis.com.au 3 2025-08-05 2026-08-13
support.cloudoffis.com.au 10 2026-05-24 2026-09-21

Programmatic access: API GET /v1/hosts/cloudoffis.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/cloudoffis.com.au.