Search for the best DNS, and you will find almost the same answer everywhere: Cloudflare, Google, Quad9, maybe NextDNS, followed by a table of DNS addresses and a claim about which one is fastest.
There is a problem with that approach.
DNS performance is not a universal leaderboard. The result can change with your location, ISP, resolver cache, and the network path between you and the content you are trying to reach. Research published in 2025 also found that DNS resolver choice can affect the CDN edge server a user is directed to, meaning DNS performance and actual website performance are not always the same thing.
So what actually happens when you change DNS?
DNS does one important job
When you type a website address such as example.com, your device needs to discover the IP address associated with that domain.
That is where a DNS resolver comes in.
Most people simply use the resolver supplied by their ISP. You can instead configure your device or router to use a public resolver such as Cloudflare’s 1.1.1.1, Google’s 8.8.8.8, or Quad9’s 9.9.9.9. Google describes its service as an alternative to the DNS resolver supplied by your current provider.
Changing the resolver changes who performs that lookup.
It does not magically upgrade your internet connection.
Does changing DNS make your internet faster?
Sometimes, but not in the way many “best DNS” articles suggest.
DNS can reduce the time required to resolve a domain before a connection begins. A resolver with better connectivity or a useful cached answer can respond faster than another resolver.
But DNS does not increase your broadband speed.
If your connection provides 100 Mbps, switching from your ISP’s DNS to Cloudflare does not turn it into a 500 Mbps connection.
There is another complication: the resolver can influence where some content is served from.
Modern websites frequently use content delivery networks. A DNS response can help determine which edge server handles the request. Research comparing public DNS services with major CDNs found that resolver choice can produce measurable differences in the latency between the user and the selected CDN edge.
That is why simply comparing DNS lookup milliseconds does not tell the whole story.
The “fastest DNS” depends on your network.
Cloudflare operates 1.1.1.1 across a large global network and says its resolver has been measured as the fastest public DNS resolver.
Google operates another large public resolver at 8.8.8.8 and 8.8.4.4.
Quad9 operates 9.9.9.9 with security filtering and a global anycast network.
Those facts tell you what the providers offer.
They do not tell you which resolver will perform best from your home network.
Your ISP may already have a resolver located very close to you. A public resolver may have better infrastructure but a less favorable route from your particular connection.
That is why a proper DNS comparison should test from the network being evaluated rather than treating one global ranking as universal.
Speed is only one part of the decision
DNS providers also make different choices about filtering and privacy.
Cloudflare’s standard 1.1.1.1 resolver does not perform content filtering. Its separate Families resolvers can block malware, phishing, and, optionally, adult content.
Quad9 takes a different approach. Its 9.9.9.9 service blocks domains associated with malicious activity such as malware and phishing, while its 9.9.9.10 service does not use threat blocking. Quad9 also says it does not log users’ IP addresses.
Google Public DNS focuses on general DNS resolution rather than content filtering. Google says temporary logs containing the user’s IP address and query information are normally retained for 24 to 48 hours, while longer-term data is anonymized and aggregated.
So asking which provider is “best” without defining what you care about is already an incomplete question.
Encrypted DNS changes the privacy equation
Traditional DNS can be transmitted without encryption.
Modern resolvers can support DNS over HTTPS (DoH) or DNS over TLS (DoT), which encrypt the connection between the client and the resolver.
Google supports both DoH and DoT, while Cloudflare and Quad9 also provide encrypted DNS options.
But encrypted DNS does not mean that nobody can see your DNS activity.
It changes who can observe the DNS request on the network path.
Your chosen resolver still receives the query.
That distinction matters when evaluating DNS privacy claims.
What DNS cannot fix
Changing DNS is unlikely to solve problems caused by:
- weak Wi-Fi
- network congestion
- high ping to a game server
- packet loss
- an overloaded website
- slow downloads
- poor cellular coverage
DNS may influence the beginning of a connection and, in some situations, the server or CDN edge selected for the connection.
It is not a general internet-speed upgrade.
This is one of the biggest problems with simplistic DNS recommendations.
So which DNS should you use?
The better question is:
What do you want your DNS resolver to do?
If you want a general-purpose public resolver, Cloudflare and Google are obvious services to test.
If you want DNS-level protection against known malicious domains, Quad9 is designed specifically around that use case.
If you want extensive filtering and personal configuration, services such as NextDNS are built around customizable DNS policies and blocklists.
And if your only goal is speed, the most useful answer is not a provider name.
Test your own connection.
The DNS test that actually matters
A useful DNS benchmark should measure more than one number.
Start with DNS lookup latency.
Then look at consistency rather than only the fastest result.
After that, test real websites and CDN-backed services. This matters because research has shown that resolver selection can affect the CDN edge returned to users.
A resolver that wins a DNS benchmark but consistently gives you a worse network path is not necessarily the better choice for your connection.
This is also why Techziano will treat DNS testing as a local measurement problem rather than a permanent global ranking.
The bottom line
There is no DNS provider that can honestly be called the fastest for every person, every ISP, and every location.
Cloudflare, Google, Quad9 and configurable services such as NextDNS solve somewhat different problems.
The important question is not:
“Which DNS is number one?”
It is:
“Which resolver gives my connection the performance, privacy and filtering I actually need?”
That is the question a useful DNS guide should answer.
And it requires more than copying a list of IP addresses from another website.
Frequently Asked Questions
Does changing DNS increase internet speed?
It can reduce DNS lookup time and may sometimes affect CDN routing, but it does not increase your internet connection’s bandwidth.
What is the fastest DNS?
There is no universally fastest resolver for every network. Performance varies with location, ISP routing, cache behavior, and other factors. Research has also found differences in the CDN paths produced by different resolvers.
Is Cloudflare DNS better than Google DNS?
Neither can be declared universally better. Both provide large public DNS services, but actual performance depends on the network from which you connect.
Is Quad9 a secure DNS?
Quad9’s 9.9.9.9 service blocks known malicious domains, including domains associated with malware and phishing.
Does DNS encryption make me anonymous?
No. DoH and DoT encrypt DNS traffic between your device and the resolver. They do not make your overall internet activity anonymous.
Should I use my ISP’s DNS or public DNS?
Test them. If your ISP resolver is already fast and reliable, switching may provide little performance benefit. A public resolver may still offer features such as encrypted DNS or security filtering that your ISP does not provide.
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Hi, I am the founder of Techziano and a technology enthusiast passionate about AI, software, web development, cybersecurity, and emerging technologies. I creates practical tutorials, software reviews, and technology insights to help readers stay informed and build valuable digital skills.
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