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.

5 hosts · 255 ms

HostCertsFirst seenLast seen
saalesparkasse.de 2 2025-12-22 2026-08-27
psd2-xs2a.saalesparkasse.de 3 2025-09-01 2026-08-14
module.saalesparkasse.de 2 2026-01-09 2026-08-27
newsletter.saalesparkasse.de 4 2026-04-16 2026-08-14
www.saalesparkasse.de 4 2026-01-09 2026-08-27

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