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 · 291 ms

HostCertsFirst seenLast seenDNS
cloud.aus.nib.com.au 1 2026-02-23 2026-02-23 servfail
image.aus.nib.com.au 1 2026-05-22 2026-05-22 ok
click.aus.nib.com.au 6 2026-03-03 2026-07-14 ok
view.aus.nib.com.au 1 2026-02-24 2026-02-24 ok

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