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 · 253 ms

HostCertsFirst seenLast seenDNS
spk-bergkamen-boenen.de 4 2026-04-15 2026-10-01 ok
psd2-xs2a.spk-bergkamen-boenen.de 3 2025-09-03 2026-08-14 nxdomain
module.spk-bergkamen-boenen.de 4 2026-04-15 2026-10-01 ok
mailing.spk-bergkamen-boenen.de 5 2026-04-27 2026-08-26 ok
www.spk-bergkamen-boenen.de 4 2026-04-15 2026-10-01 ok

Programmatic access, with DNS A records: API GET /v1/hosts/spk-bergkamen-boenen.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-bergkamen-boenen.de.