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 · 291 ms

Download CSV
HostCertsFirst seenLast seen
speartip.com 61 2025-07-03 2026-10-18
*.speartip.com 61 2025-07-03 2026-10-18
dev.speartip.com 3 2025-07-03 2025-07-10
www.speartip.com 3 2025-07-03 2025-07-10

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