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.

7 hosts · 320 ms

HostCertsFirst seenLast seenDNS
lusben.com 1 2025-10-27 2025-10-27 ok
*.lusben.com 1 2025-10-27 2025-10-27 —
cloud.marketing.lusben.com 1 2026-07-07 2026-07-07 ok
image.marketing.lusben.com 56 2026-07-07 2026-09-30 ok
click.marketing.lusben.com 1 2026-07-07 2026-07-07 ok
view.marketing.lusben.com 1 2026-07-07 2026-07-07 ok
go.lusben.com 4 2026-04-18 2026-08-14 ok

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