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 · 261 ms

HostCertsFirst seenLast seen
greenprice.com 17 2026-05-24 2026-10-05
*.greenprice.com 2 2026-01-02 2026-01-02
www.greenprice.com 13 2026-05-24 2026-10-04

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