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 · 265 ms

HostCertsFirst seenLast seenDNS
lentusllc.com 14 2026-04-14 2026-08-10 ok
link.lentusllc.com 4 2026-06-07 2026-10-05 ok
www.lentusllc.com 10 2026-04-14 2026-08-10 ok

Programmatic access, with DNS A records: API GET /v1/hosts/lentusllc.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/lentusllc.com.