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.

5 hosts · 331 ms

HostCertsFirst seenLast seenDNS
kreissparkasse-eichsfeld.de 4 2026-04-13 2026-09-29 ok
psd2-xs2a.kreissparkasse-eichsfeld.de 2 2025-08-18 2026-07-21 nxdomain
module.kreissparkasse-eichsfeld.de 4 2026-04-13 2026-09-29 ok
mailing.kreissparkasse-eichsfeld.de 5 2026-05-09 2026-09-06 ok
www.kreissparkasse-eichsfeld.de 4 2026-04-13 2026-09-29 ok

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