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.

4 hosts · 214 ms

Download CSV
HostCertsFirst seenLast seen
yakmat.com 6 2026-06-07 2026-10-05
go.yakmat.com 8 2026-05-06 2026-10-03
get.yakmat.com 20 2026-05-23 2026-09-19
www.yakmat.com 6 2026-06-07 2026-10-05

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