Quad9: A Free DNS Service That Blocks Malware and Protects Your Privacy
An open DNS recursive service for free security and high privacy
Quad9 is a free, open DNS recursive service that replaces your default ISP or enterprise DNS configuration to block malicious hostnames in real time. Operated by the Swiss-based Quad9 Foundation, it leverages threat intelligence from over 25 providers to protect against malware, phishing, spyware, and botnets. With 670M+ daily blocks and 230+ resolver clusters in over 110 countries, Quad9 guarantees privacy by never logging IP addresses and is GDPR-compliant. No sign-up is required, and it's free to use for individuals and organizations.
Quad9 is the only large DNS resolver with a founding charter that includes privacy as a primary goal, and the Quad9 team is devoted to the concept of keeping personal data under the control of the end user.