Quad9 is a nonprofit organization, with no commercial motivation or desire to profit from or distribute data which we believe to be private and vital to an open and free Internet. We do not redirect unknown domain resolution (“NXDOMAIN”) to advertising-based websites.

If we do block a domain based on known threat data, we may in the future redirect ONLY those results to a Website which explains to the end user why they are not reaching their intended location, with a method to feedback operational issues or questions to Quad9.

Quad9 does generate and share high level anonymized aggregate statistics, including metrics on threat type, geolocation, and if available, sector, as well as other vertical metrics including performance on Quad9 (i.e. number of threats blocked, infrastructure uptime) when available with the public and our threat intelligence partners.

We share anonymized data on specific domains (such as domain, timestamp, geolocation, number of hits, first seen, last seen) with our threat intelligence partners. Please note that this information does not contain source IP information or any other identifier that would directly identify the end user or their organization.

In addition, as a default, users of the service will be blocked from unknowingly passing origin network data through to authoritative nameservers, which is a privacy leakage issue about which most people are unaware. There are specific methods (IP addresses different than our “primary” addresses) which allow this feature to be selected for re-activation, and end users selecting these alternate resolution IP addresses accept the risks of this information being transmitted to end authoritative nameserver operators or intermediate interception potential.

We believe that by building this platform and enabling the security industry to operationalize their threat intelligence through this service, we can provide a basic level of protection to the worldwide Internet population and have a positive impact on global systemic cyber risk.

For a more detailed description of our Privacy, Data Collection and Use Policy, please click here.

We update this policy frequently to enumerate additional protections and conditions; please check back often.