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.

6 hosts · 252 ms

Download CSV
HostCertsFirst seenLast seen
kaon.com 7 2025-11-12 2026-10-07
*.kaon.com 7 2025-11-12 2026-10-07
kb.kaon.com 3 2026-06-14 2026-09-29
blog.kaon.com 3 2026-04-29 2026-08-31
go.kaon.com 10 2026-04-25 2026-09-22
sales.kaon.com 5 2026-06-06 2026-10-10

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