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 · 247 ms

HostCertsFirst seenLast seen
sparkasse-ansbach.de 2 2026-04-22 2026-04-23
psd2-xs2a.sparkasse-ansbach.de 4 2025-08-11 2026-07-10
module.sparkasse-ansbach.de 2 2026-04-22 2026-04-23
mailing.sparkasse-ansbach.de 4 2026-04-16 2026-08-14
www.sparkasse-ansbach.de 2 2026-04-22 2026-04-23

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