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Internet Service Provider

Internet Service Provider

Quad9 provides ISPs an easy way of protecting their customers. Quad9 actively blocks access to known malicious domains, thwarting phishing URLs, delivery of malware, ransomware and other types of malicious activity that use DNS.

Your customers are looking to you as their provider to protect them against Internet threats.  Even if your terms of service explicitly state that you have no guarantees of protection, they trust you to do the right thing for their security. Quad9 can provide you and them with a basic level of security by providing a DNS service with a large set of blocked hosts which are trying to harm your customers with malware, phishing, cyberjacking, or other fraudulent attacks.

How It Works


Quad9 provides basic cybersecurity at no cost. We combine almost 20 different threat feeds into a DNS blocklist that helps keep your end users safe. We also have non-blocking service options if that is your preference. DNSSEC, encryption (DoT, DoH ,dnscrypt), and proximity to many root and TLD servers. We do DNS security for a living.


Quad9 has anycast systems in more than 145 locations in 88 countries. We can deploy nodes inside your network if you want the highest performance option (cost offsets may apply for this method).


If GDPR applies to your organization, using Quad9 may eliminate some burden by creating a non-logging service that is outside your administrative authority. Quad9 does not log IP addresses, and has no way of associating queries with end users.

We are a 501(c)3 not-for-profit, and we do not have a for-profit agenda or secondary product line that would risk customer privacy.

Overall Benefits

Threat Reduction – Reduce the threats of DDoS botnets, and protect your network from the risks from hacked clients.

Reduce Cost – Eliminate the operational and capital expense of operating your own DNS resolvers which may vary based on traffic, attacks, and software development effort.

Friction-free deployment – There is no sign-up, no document to sign, no fees to pay. Experimentation is easy, and conversion to production requires no action on your part.


We do not store or log to disk the source IP from which a query originated.

Are you an ISP looking to partner with Quad9 or have questions?

Whether you are interested in talking with us about a custom deployment, or an ISP engineer who has questions that you would like to have us answer
before deploying, please contact us via our support form and we’ll have someone get back to you with answers.

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