Open data
Filter lists
Our own hand-curated lists of legitimate and malicious domains from Germany and the DACH region. Free to use under CC0, built from curation and your reports – never from our customers' traffic.
The lists
| List | Entries | Updated | Download |
|---|---|---|---|
| Allowlist | 105 | 27.09.2026 | allow.txt · allow.json · Signature |
| Blockliste | 1487 | 06.10.2026 | block.txt · block.json · Signature |
License: CC0-1.0. Every file is signed with Ed25519. Public key
What this is about
There are plenty of blocklists. A maintained allowlist of legitimate German business domains barely exists – and that is exactly what reduces false positives in network monitoring. We maintain it for our product anyway and publish it so others can use it.
What is not included: domains from our customers' traffic. The appliance matches inside the customer network; only hits leave it. The lists grow from public sources, our own review and your reports. Third-party lists serve only as confirmation, never as a source.
Report a domain
Is a legitimate company missing, or is a domain wrongly listed? Report it here, no account needed. Every report is reviewed by hand.
For a report we store the domain, classification, reason, the optional contact and a day-dependent hash of the sender address to prevent abuse. Processed reports are deleted after 180 days.