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Text Content

Service

Service
 * Service
 * Addresses & Features
 * Threat blocking
 * Privacy
 * Locations
   


News

News
 * News
 * Blog
 * Press
 * Media Kit
   


Support

Support
 * Support
 * Set up guides
 * FAQ
 * Search Blocked Domains
 * Get support
   


About

About
 * About
 * Foundation Council
 * Jobs
 * Transparency Report
 * Sponsors
 * Partners
 * 

en ▾
 * Deutsch
 * English
 * Español
 * Français
 * Português


IPV4

 * 9.9.9.9

 * 149.112.112.112


IPV6

 * 2620:fe::fe

 * 2620:fe::9

More options ▸


AN OPEN DNS RECURSIVE SERVICE FOR FREE SECURITY AND HIGH PRIVACY

Quad9 is a free service that replaces your default ISP or enterprise Domain Name
Server (DNS) configuration. When your computer performs any Internet transaction
that uses the DNS (and most transactions do), Quad9 blocks lookups of malicious
host names from an up-to-the-minute list of threats. This blocking action
protects your computer, mobile device, or IoT systems against a wide range of
threats such as malware, phishing, spyware, and botnets, and it can improve
performance in addition to guaranteeing privacy. The Quad9 DNS service is
operated by the Swiss-based Quad9 Foundation, whose mission is to provide a
safer and more robust Internet for everyone.

Watch our short videos on how to set up Quad9 - Windows / MacOS ▸

60M

Average Daily Blocks

18+

Threats Intelligence Providers

150

Resolver Clusters in 90 countries

Watch our short videos on how to set up Quad9 - Windows / MacOS ▸


PRIVACY


HOW QUAD9 PROTECTS YOUR PRIVACY

When your devices use Quad9 normally, no data containing your IP address is ever
logged in any Quad9 system. Connections can employ encryption if your system
supports it, and the entire Quad9 platform has been designed to be
GDPR-compliant from the first public announcement in 2017.

Read more about Quad9’s privacy ▸


WHY QUAD9 IS DEDICATED TO DATA PRIVACY

Every transaction on the Internet starts with a DNS event. This name lookup
reveals critically sensitive data about the person triggering that transaction.
The nature of those name lookups has created a strong and dangerous motivation
for commercialization of personal data from DNS recursive resolver services.
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.

> Quad9’s organizational move to Switzerland is important for the free and open
> internet because it provides much-needed geographic and legal diversity in the
> open DNS resolver space. It also shows that Quad9 is actively seeking to work
> within the legislative framework that best serves the privacy of its users. I
> support the Quad9 open resolver because it puts the end user first and helps
> build a secure and private internet without collecting – and therefore without
> the possibility of commercializing – users’ personal information. I believe
> Quad9’s philosophy of openness and transparency in handling users’ data
> resonates strongly with the core beliefs of our community.”

Christian Kaufmann

Chairman,
RIPE

> The privacy and security of Internet users depend on the availability of
> private and secure services, critically including Domain Name System
> resolvers. Digitale Gesellschaft operates one such DNS resolver for
> Switzerland, and we welcome Quad9 and its established global reach to
> Switzerland.”

Erik Schönenberger

Executive Officer,
Digitale Gesellschaft


SECURITY


HOW QUAD9 BLOCKS MALWARE

Quad9 routes your DNS queries through a secure network of servers around the
globe. The system uses threat intelligence from more than a dozen of the
industry’s leading cybersecurity companies to give a real-time perspective on
what websites are safe and what sites are known to include malware or other
threats. If the system detects that the site you want to reach is known to be
infected, you’ll automatically be blocked from entry – keeping your data and
computer safe.


WHY QUAD9 PROVIDES SECURITY SERVICES

For the Internet to be an effective tool, users must trust their ability to use
online services without fear of theft, fraud, or misuse of their devices by
criminals. Public and private network operators need protection against
malicious use of infrastructure resources and attacks against their users or
customers. Quad9’s mission is to improve the security and stability of the
Internet to allow everyone to be less vulnerable to risks and more effective in
their daily online interactions.


CHECK TO SEE IF A DOMAIN IS IN THE MILLIONS OF MALICIOUS DOMAINS QUAD9 BLOCKS

Enter a hostname or domain name to check if it is blocked by Quad9

Search


PARTICIPATE


HOW TO USE QUAD9

Quad9 can be used simply by setting the DNS server settings for your device to
the addresses given in one of our service profiles. No sign-up is required, no
account data needs to be given to Quad9, and there is no contract. Quad9 is free
to use and collects no personal data about you. You can configure your router or
wifi access point to distribute these settings, which will extend protection to
all the elements on your local network including IoT devices, many of which
otherwise would not have any anti-malware defenses.


WHY PARTICIPATE?

Quad9 is a not-for-profit organization, relying on grants and partnerships with
commercial and non-commercial sources and from individuals. Your use of Quad9
may prevent a ransomware attack, prevent your bank account from being
compromised, or protect your laptop from being used as part of an illicit
criminal attack on others. All of these potential protections and many millions
of other interventions have a direct savings result for you, your business or
organization, and the companies you rely on such as banks and e-commerce firms.
We hope that this understanding may inspire you to donate to Quad9, as an
individual or with a corporate sponsorship.



Quad9
c/o SWITCH
Werdstrasse 2
8004 Zürich
Switzerland


MAJOR SPONSORS

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This work is licensed under a CC BY-NC SA 4.0 License