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.

3 hosts · 285 ms

HostCertsFirst seenLast seen
gozayzoon.com 12 2026-05-23 2026-09-19
*.gozayzoon.com 2 2025-09-24 2026-08-25
www.gozayzoon.com 7 2026-05-31 2026-09-26

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