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 · 263 ms

HostCertsFirst seenLast seenDNS
shopback.co.nz 32 2026-01-08 2026-09-24 ok
*.shopback.co.nz 36 2026-01-08 2026-09-24 —
fp.shopback.co.nz 2 2025-09-15 2026-08-16 ok
support.shopback.co.nz 6 2026-06-03 2026-10-01 ok

Programmatic access, with DNS A records: API GET /v1/hosts/shopback.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/shopback.co.nz.