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.

5 hosts · 326 ms

Download CSV
HostCertsFirst seenLast seen
trueprimal.com 5 2026-05-12 2026-09-11
shop.trueprimal.com 5 2026-05-09 2026-09-05
account.trueprimal.com 1 2026-09-03 2026-09-03
test.trueprimal.com 5 2026-04-26 2026-08-26
www.trueprimal.com 5 2026-05-12 2026-09-11

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