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 · 321 ms

HostCertsFirst seenLast seenDNS
indebted.nz 1 2026-05-22 2026-05-22 ok
oca.indebted.nz 5 2026-04-26 2026-08-14 ok
www.indebted.nz 1 2026-05-22 2026-05-22 ok
pay.indebted.nz 2 2025-08-28 2026-08-28 ok
www.pay.indebted.nz 1 2025-08-28 2025-08-28 nxdomain

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