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 · 183 ms

HostCertsFirst seenLast seen
spk-hohenlohekreis.de 4 2026-03-27 2026-09-12
psd2-xs2a.spk-hohenlohekreis.de 2 2025-07-30 2026-06-22
module.spk-hohenlohekreis.de 4 2026-03-27 2026-09-12
mailing.spk-hohenlohekreis.de 5 2026-05-21 2026-09-18
www.spk-hohenlohekreis.de 4 2026-03-27 2026-09-12

Programmatic access: API GET /v1/hosts/spk-hohenlohekreis.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/spk-hohenlohekreis.de.