An open DNS recursive service for free security and high privacy

Sep 05, 2026 03:13 AM - 1 hour ago 2

Quad9 is simply a free work that replaces your default ISP aliases endeavor Domain Name Server (DNS) configuration. When your machine performs immoderate Internet transaction that uses the DNS (and astir transactions do), Quad9 blocks lookups of malicious big names from an up-to-the-minute database of threats. This blocking action protects your computer, mobile device, aliases IoT systems against a wide range of threats specified arsenic malware, phishing, spyware, and botnets, and it can improve capacity successful summation to guaranteeing privacy. The Quad9 DNS service is operated by the Swiss-based Quad9 Foundation, whose ngo is to supply a safer and much robust Internet for everyone.

670M+

Average Daily Blocks

230+

Resolver Clusters successful complete 110 countries

25+

Threat Intelligence Providers

Privacy

How Quad9 protects your privacy

When your devices usage Quad9 normally, nary information containing your IP reside is ever logged successful immoderate Quad9 system. Connections tin employment encryption if your system supports it, and the full Quad9 level has been designed to be GDPR-compliant from the first nationalist announcement successful 2017.

Read much astir Quad9’s privacy

Why Quad9 is dedicated to information privacy

Every transaction connected the Internet starts pinch a DNS event. This sanction lookup reveals critically delicate information astir the personification triggering that transaction. The quality of those sanction lookups has created a beardown and vulnerable motivation for commercialization of individual information from DNS recursive resolver services. Quad9 is the only ample DNS resolver pinch a founding charter that includes privacy arsenic a superior goal, and the Quad9 squad is devoted to the conception of keeping individual information nether the power of the extremity user.

Security

How Quad9 blocks malware

Quad9 routes your DNS queries done a unafraid web of servers astir the globe. The strategy uses threat intelligence from much than a twelve of the industry’s starring cybersecurity companies to springiness a real-time position on what websites are safe and what sites are known to see malware aliases other threats. If the strategy detects that the tract you want to scope is known to be infected, you’ll automatically beryllium blocked from introduction – keeping your information and computer safe.

Why Quad9 provides information services

For the Internet to beryllium an effective tool, users must spot their expertise to use online services without fearfulness of theft, fraud, aliases misuse of their devices by criminals. Public and backstage web operators request protection against malicious usage of infrastructure resources and attacks against their users or customers. Quad9’s ngo is to amended the information and stableness of the Internet to let everyone to beryllium little susceptible to risks and much effective in their regular online interactions.

Check to spot if a domain is successful the millions of malicious domains Quad9 blocks

Enter a hostname aliases domain sanction to cheque if it is blocked by Quad9

Participate

How to usage Quad9

Quad9 tin beryllium utilized simply by mounting the DNS server settings for your instrumentality to the addresses fixed successful one of our work profiles. No sign-up is required, nary relationship information needs to beryllium fixed to Quad9, and there is nary contract. Quad9 is free to usage and collects nary individual information astir you. You tin configure your router aliases wifi entree constituent to administer these settings, which will widen protection to each the elements connected your local network including IoT devices, galore of which different would not person any anti-malware defenses.

Why participate?

Quad9 is simply a not-for-profit organization, relying connected grants and partnerships with commercial and non-commercial sources and from individuals. Your usage of Quad9 may forestall a ransomware attack, forestall your slope relationship from being compromised, aliases protect your laptop from being utilized arsenic portion of an illicit criminal onslaught connected others. All of these imaginable protections and galore millions of different interventions person a nonstop savings consequence for you, your business or organization, and the companies you trust connected specified arsenic banks and e-commerce firms. We dream that this knowing whitethorn animate you to donate to Quad9, arsenic an individual aliases pinch a firm sponsorship.

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