Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

4 hosts · 233 ms

Download CSV
HostCertsFirst seenLast seen
lucidspark.com 10 2025-06-18 2026-09-18
*.lucidspark.com 9 2025-06-18 2026-10-14
*.app.lucidspark.com 8 2025-06-18 2026-08-25
cdn-cashy-static-assets.lucidspark.com 7 2025-06-19 2026-09-24

Programmatic access: API GET /v1/hosts/lucidspark.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/lucidspark.com.