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.

13 hosts · 247 ms

HostCertsFirst seenLast seen
joinhandshake.de 35 2026-04-16 2026-10-08
*.joinhandshake.de 26 2026-04-16 2026-10-08
segment-api.joinhandshake.de 2 2026-05-30 2026-07-22
audiorca-external.joinhandshake.de 3 2026-04-11 2026-07-31
cdn.joinhandshake.de 2 2026-06-03 2026-07-29
segment-cdn.joinhandshake.de 2 2026-05-05 2026-07-01
importer-admin.joinhandshake.de 2 2026-05-07 2026-07-02
*.learn.joinhandshake.de 7 2026-05-06 2026-09-01
*.labs.joinhandshake.de 2 2026-10-05 2026-10-05
*.ext.joinhandshake.de 7 2026-05-06 2026-09-01
preview.joinhandshake.de 5 2026-06-04 2026-10-05
www.joinhandshake.de 5 2026-04-26 2026-08-27
statuspage-proxy.joinhandshake.de 3 2026-04-22 2026-08-08

Programmatic access: API GET /v1/hosts/joinhandshake.de (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/joinhandshake.de.