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.

10 hosts · 224 ms

HostCertsFirst seenLast seen
geuder.de 19 2025-11-18 2026-08-27
*.geuder.de 13 2025-11-18 2026-08-27
xn--sprbar-4ya.geuder.de 5 2026-05-20 2026-09-22
brand.geuder.de 1 2026-09-30 2026-09-30
dl.geuder.de 5 2026-05-10 2026-09-07
*.dl.geuder.de 2 2026-05-10 2026-05-10
info.geuder.de 10 2026-06-02 2026-09-28
spuerbar.geuder.de 5 2026-05-20 2026-09-22
vivos-agent.geuder.de 2 2026-04-22 2026-08-14
www.geuder.de 8 2026-04-15 2026-06-17

Programmatic access: API GET /v1/hosts/geuder.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/geuder.de.