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.

6 hosts · 214 ms

HostCertsFirst seenLast seen
nzsb.co.nz 9 2026-04-14 2026-09-30
*.nzsb.co.nz 9 2026-04-14 2026-09-30
link.nzsb.co.nz 6 2026-04-21 2026-08-19
ds.nzsb.co.nz 5 2026-05-09 2026-09-06
*.ams.nzsb.co.nz 3 2026-04-14 2026-09-30
mta-sts.nzsb.co.nz 4 2026-05-12 2026-10-01

Programmatic access: API GET /v1/hosts/nzsb.co.nz (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/nzsb.co.nz.