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 · 266 ms

Download CSV
HostCertsFirst seenLast seen
yakaccess.com 7 2026-04-26 2026-09-23
maintenance.yakaccess.com 9 2026-05-31 2026-09-27
servicedocumentation.yakaccess.com 5 2026-04-25 2026-10-01
go.yakaccess.com 11 2026-04-25 2026-09-22
www.yakaccess.com 9 2026-04-26 2026-09-23

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