Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

10 hosts · 260 ms

HostCertsFirst seenLast seenDNS
sparkasse-freiburg.de 4 2026-03-31 2026-09-16 ok
psd2-xs2a.sparkasse-freiburg.de 2 2025-08-05 2026-06-23 nxdomain
module.sparkasse-freiburg.de 4 2026-03-31 2026-09-16 ok
presse.sparkasse-freiburg.de 11 2026-05-24 2026-09-20 ok
mailing.sparkasse-freiburg.de 5 2026-05-31 2026-09-27 ok
t.sparkasse-freiburg.de 3 2026-07-20 2026-09-24 ok
vorteilswelt.sparkasse-freiburg.de 1 2025-12-10 2025-12-10 ok
lokalist.sparkasse-freiburg.de 3 2025-08-11 2026-09-23 ok
www.lokalist.sparkasse-freiburg.de 2 2025-08-11 2026-04-05 nxdomain
www.sparkasse-freiburg.de 4 2026-03-31 2026-09-16 ok

Programmatic access, with DNS A records: API GET /v1/hosts/sparkasse-freiburg.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-freiburg.de.