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.

3 hosts · 311 ms

HostCertsFirst seenLast seenDNS
new-leaf-products.com 11 2026-04-13 2026-09-23 ok
ops.new-leaf-products.com 5 2026-05-29 2026-09-26 ok
www.new-leaf-products.com 11 2026-04-12 2026-09-24 ok

Programmatic access, with DNS A records: API GET /v1/hosts/new-leaf-products.com (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/new-leaf-products.com.