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.

9 hosts · 210 ms

HostCertsFirst seenLast seen
stockholding.com 1 2026-02-02 2026-02-02
*.stockholding.com 1 2026-02-02 2026-02-02
tracking.digidoc.stockholding.com 4 2026-06-06 2026-10-02
www.digidoc.stockholding.com 5 2026-06-08 2026-10-06
go.stockholding.com 5 2026-05-08 2026-09-05
tracking.ib57115.promotions.stockholding.com 5 2026-04-17 2026-10-10
www.digidocuat.stockholding.com 4 2026-06-05 2026-10-03
gateway.stockholding.com 1 2025-08-13 2025-08-13
www.gateway.stockholding.com 1 2025-08-13 2025-08-13

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