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.

11 hosts · 252 ms

HostCertsFirst seenLast seen
yndika.com 8 2026-02-26 2026-09-12
*.yndika.com 1 2026-02-26 2026-02-26
collections-pre.yndika.com 1 2026-09-29 2026-09-29
ops-pre.yndika.com 1 2026-09-29 2026-09-29
cdn.yndika.com 3 2026-05-15 2026-09-28
url9072.recoveries.yndika.com 2 2026-09-10 2026-09-10
collections.yndika.com 1 2026-09-29 2026-09-29
ops.yndika.com 1 2026-09-29 2026-09-29
collections-dev.yndika.com 1 2026-09-29 2026-09-29
ops-dev.yndika.com 1 2026-09-29 2026-09-29
www.yndika.com 7 2026-05-14 2026-09-12

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