What Is Quad9 DNS? The Future of Secure DNS Services

Last Updated: June 10, 2023By
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In the digital era where we live, work, and play online, the importance of a secure and robust internet connection cannot be overstated. We use the internet for a myriad of tasks—everything from sending critical business emails, to accessing bank accounts, shopping, or just browsing for information.

Yet, while we enjoy the convenience and opportunities that the internet provides, lurking in the shadows are countless threats such as malware, phishing attempts, and identity thefts that can disrupt our lives in unimaginable ways.

Enter Quad9—a free, secure DNS service designed to protect users from security threats on the internet, while also prioritizing privacy and performance. It acts like a security guard, constantly vigilant and protecting you from threats as you navigate the vast digital landscape.

Overview of DNS and Its Function

To better understand what DNS is, imagine having to remember the precise geographical coordinates for every place you want to visit instead of their names. It would be quite challenging, right? That’s where the Domain Name System (DNS) comes in handy in the digital world.

DNS translates easily remembered domain names like www.google.com into an IP address, like, that computers use to identify each other on the network. In essence, DNS acts as the phonebook of the internet, linking domain names with their respective IP addresses.

How DNS Works: A Closer Look

The DNS process begins the moment you type a website’s address into your browser. Your computer sends a query asking for the IP address associated with the domain name. This query travels across the internet and reaches a DNS server.

The DNS server then responds with the corresponding IP address. Your computer uses this IP address to locate and connect you to the website you’re seeking.

This system works behind the scenes and typically takes just milliseconds. It allows us to browse the internet conveniently without memorizing long strings of numbers for every website we wish to visit.

The Role of DNS in Internet Connectivity

DNS plays a fundamental role in how we use the internet. Without it, we’d have a hard time navigating the expansive digital landscape. DNS not only makes it easier for us to access websites, but it also enables emails to reach their proper destinations and ensures that online services work effectively and efficiently.

In addition, DNS has roles in internet security. For instance, some DNS services, like Quad9, offer protection from internet threats like malware, phishing attacks, and botnets by blocking access to harmful websites.

Deep Dive into Quad9

Quad9, a non-profit organization, has been offering a free, secure DNS platform since its establishment. Driven by a mission to protect individuals and organizations worldwide from cyber threats, Quad9 brings together cyber threat intelligence from numerous sources to provide a robust shield against harmful websites and applications.

In a significant move reflecting their commitment to user privacy and security, Quad9 announced on February 17, 2021, that it had moved its headquarters from California to Zürich, Switzerland. This decision underscores Quad9’s dedication to being within a jurisdiction that upholds the highest global privacy standards.

The Inner Workings of Quad9

At its core, Quad9 functions much like any other DNS service, translating domain names into IP addresses to ensure smooth internet navigation. However, where Quad9 stands out is in its integrative threat intelligence and strict privacy policy.

When you use Quad9 and make a request to a website, Quad9 cross-checks the domain against its expansive database of malicious websites. If the site is flagged as harmful, Quad9 blocks your connection to it, thereby ensuring your digital safety.

Key Features of Quad9


Quad9’s prime feature is its security. The DNS platform blocks a wide variety of threats, such as malware, phishing attacks, and botnets, by preventing connections to harmful websites.

Independent tests show that Quad9 prevents users’ devices from connecting to 97% of malicious websites.


Unlike many DNS providers that monetize users’ personal data and browsing history, Quad9 does not collect any personal information. Queries and addresses are neither collected nor recorded.

By moving its base to Switzerland, a country known for its strong privacy laws, Quad9 ensures its users enjoy the full protection of Swiss law. No matter where they are in the world, Quad9 users can benefit from the same legally enforced privacy protection as a Swiss citizen.


In addition to security and privacy, Quad9 also emphasizes performance. With servers located in more than 200 locations in ninety countries, Quad9 ensures fast, reliable, and secure internet navigation. Quad9 works behind the scenes, delivering a seamless internet experience to its users while keeping them safe from cyber threats.

Quad9’s Security Features

Here, we’ll examine Quad9’s robust suite of security features that protect users from a variety of cyber threats, making it a standout choice for DNS services.

Quad9’s Threat Intelligence: A Proactive Approach

At the heart of Quad9’s security features lies its proactive threat intelligence. The service integrates a multitude of cyber threat intelligence sources, including notable entities like SWITCH, to curate a comprehensive database of malicious domains.

When a user makes a request to a specific website, Quad9 checks the domain against this database. If the site is identified as malicious, Quad9 intervenes by blocking the connection, effectively preventing the user from being exposed to the potential threat.

Comprehensive Malware and Phishing Protection

Quad9 goes above and beyond in its commitment to secure internet browsing by offering extensive protection against malware and phishing attempts. These cyber threats, often delivered via deceptive websites or emails, aim to steal sensitive user information or damage computer systems.

By blocking users’ access to known malicious websites, Quad9 acts as the first line of defense against these pervasive online threats.

Anonymized Cybersecurity Data for Global Threat Response

One of Quad9’s core principles is its commitment to enhancing global cybersecurity. While it doesn’t store personal data, the service does gather anonymized data about the threats it encounters.

This information is vital in contributing to the broader global cybersecurity response, helping other organizations and entities understand, predict, and effectively respond to evolving cyber threats.

Case Studies: Proving Quad9’s Effectiveness in Providing Security

Quad9’s security effectiveness is not just theoretical; it’s backed by real-world evidence. Independent tests have shown that Quad9 blocks connections to 97% of malicious websites.

This has a direct and significant impact on the user’s security, shielding them from the majority of cyber threats prevalent on the internet. Quad9’s commitment to security extends to the scale of its operation, with the service reportedly protecting internet users from over 220 million malicious attacks each day.

Privacy Aspects of Quad9

DNS letters on blocks

Quad9 goes beyond just providing a secure DNS service; it also champions user privacy. 

Quad9: Respecting User Privacy

Privacy is one of the cornerstone values of Quad9. Unlike many commercial DNS providers that generate revenue by selling users’ personal data and browsing history, Quad9 has taken a fundamentally different approach.

The service does not collect or record any personal data of its users. This policy ensures that users’ activities online remain private and that no third parties have access to them.

Quad9’s Privacy Policy: An Examination

Quad9’s privacy policy is rooted in stringent laws that protect personal data. Having moved its headquarters to Zürich, Switzerland, Quad9 now operates under Swiss jurisdiction, known for its stringent privacy laws that align with the European-standard General Data Protection Regulation (GDPR).

These laws grant individuals enforceable rights and effective remedies, which means that Quad9 users around the world benefit from the full protection of Swiss law.

A Comparative Look: Quad9 Versus Other DNS Services

When compared to other DNS services, particularly those based in jurisdictions with less stringent privacy laws, Quad9 clearly sets itself apart. Many large DNS providers, especially those based in the United States, are shielded from privacy claims and responsibilities to users.

However, Quad9 has willingly placed itself under the legally binding authority of a strong privacy regulator – the Swiss Federal Data Protection and Information Commissioner.

By using Quad9, anyone in the world can receive the same fully legally enforced protection as a Swiss citizen, without restrictions regarding their citizenship or residence. This user-centric approach to privacy makes Quad9 the only global DNS security provider to offer these universal privacy protections.

In essence, Quad9’s commitment to privacy means that users can enjoy a secure, high-performing internet experience without having to worry about their personal data being collected, analyzed, or sold.

How to Use Quad9

Adopting Quad9 as your DNS service is a straightforward process. Whether you’re an individual user seeking to enhance your personal online security or an organization looking to protect its network, Quad9 can be easily integrated into your setup.

Changing Your DNS Settings to Quad9

The first step to using Quad9 involves changing your DNS settings. Here’s how you can do this:

On Windows:

  1. Open the Control Panel and go to Network and Internet > Network and Sharing Center.
  2. Click on “Change adapter settings.”
  3. Right-click your current network (could be Ethernet or Wi-Fi), then click Properties.
  4. Select Internet Protocol Version 4 (TCP/IPv4) or Internet Protocol Version 6 (TCP/IPv6) and click Properties.
  5. Click “Use the following DNS server addresses.”
  6. Replace the existing addresses with Quad9’s addresses: and for IPv4, or 2620:fe::fe for IPv6.
  7. Click OK and close all windows.

On macOS:

  1. Open System Preferences and go to Network.
  2. Select your current network (Ethernet or Wi-Fi), then click Advanced.
  3. Go to the DNS tab.
  4. Click the ‘+’ button and add Quad9’s DNS servers: and for IPv4, or 2620:fe::fe for IPv6.
  5. Click OK, then Apply.

Note: If you’re setting up Quad9 on a router or for an entire organization, it’s recommended to consult with a network professional to ensure a seamless transition.

Verifying Your Quad9 Setup

After you’ve updated your DNS settings, it’s important to confirm that your system is now using Quad9 for DNS queries. Quad9 provides a simple way to verify this.

You can do this by visiting Quad9’s setup guide on their official website. The guide offers tools and instructions to help confirm if your DNS queries are indeed being securely resolved by Quad9.

In addition, you can directly check if you’re using Quad9 DNS by visiting this link: https://on.quad9.net/. This page will automatically analyze your connection and let you know if you’re successfully using Quad9’s service.

Browsing Safely with Quad9

Once you’ve set up and verified Quad9, you can browse the internet with the confidence that your online activities are secure, private, and fast. And all of these benefits come at no cost, as Quad9 is a non-profit organization offering this service free of charge.

With Quad9, you get to contribute to a safer internet for everyone, while enjoying enhanced protection yourself.

The Future of Quad9 and Internet Security

As the digital age continues to advance, so too does the complexity and sophistication of cyber threats. Malicious actors are perpetually devising new strategies and tactics to exploit digital vulnerabilities, leading to an escalating cyber threat landscape.

Quad9’s Response to Evolving Threats

In the face of these escalating threats, Quad9 continues to adapt and refine its approach. By integrating an ever-growing array of threat intelligence sources into its database, Quad9 can effectively block a broader range of threats. Its commitment to providing users with robust online protection remains steadfast, and as cyber threats evolve, so too will Quad9’s countermeasures.

Future Plans for Quad9

The future of Quad9 holds promising prospects. By moving its headquarters to Switzerland, Quad9 has shown its commitment to prioritizing user privacy. Going forward, Quad9 plans to continue strengthening its protective measures, improving its performance, and promoting user privacy.

One area of future growth could be in forming partnerships with other organizations that share Quad9’s vision for a safer internet. These alliances can help Quad9 expand its reach and improve its threat intelligence capabilities. The partnership with SWITCH, for example, has not only facilitated Quad9’s move to Switzerland but also helped enhance Quad9’s governance and threat intelligence.

The Future of Internet Security with Quad9

In the broader context of internet security, Quad9 is playing a significant role in shaping the future. The organization has demonstrated that it is possible to deliver a high-performing, secure DNS service without infringing on user privacy.

By providing an effective, privacy-respecting solution, Quad9 sets a high standard in the industry. It challenges other DNS service providers to prioritize user privacy and security over the monetization of personal data. Quad9’s approach presents a new vision for the future of internet security, one that favors user protection over profit.