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 · 258 ms

HostCertsFirst seenLast seen
sparkasse-bgl.de 2 2026-04-22 2026-10-08
psd2-xs2a.sparkasse-bgl.de 2 2025-07-30 2026-06-22
module.sparkasse-bgl.de 2 2026-04-22 2026-10-08
mailing.sparkasse-bgl.de 5 2026-04-27 2026-08-25
www.sparkasse-bgl.de 2 2026-04-22 2026-10-08

Programmatic access: API GET /v1/hosts/sparkasse-bgl.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/sparkasse-bgl.de.