DNS Speed Benchmark
Compare resolution speeds of top public DNS providers.
When you open a website, your browser needs to find the server that hosts that website. Before your browser can connect to the server, the website’s domain name usually needs to be translated into an IP address.
This process is called DNS resolution.
A DNS Speed Test checks how quickly DNS queries receive responses. It can help you understand the performance of your current DNS resolver and compare response times between different DNS services.
DNS is an important part of how the internet works. It translates human-readable domain names into IP addresses that computers use to find websites and online services.
What Is DNS?
DNS stands for Domain Name System.
You can think of DNS as the internet’s address book.
People usually remember website names such as:
- google.com
- wikipedia.org
- youtube.com
- speedtestuk.com
Computers communicate using IP addresses.
DNS helps translate the domain name into the IP address needed to reach the correct server.
Without DNS, using websites would be much harder because users would need to remember IP addresses instead of simple domain names.
What Is a DNS Speed Test?
A DNS Speed Test measures how quickly a DNS resolver responds to DNS queries.
The test may check several domain names and measure the response time.
The result is commonly shown in milliseconds (ms).
For example:
| DNS Response | General Meaning |
|---|---|
| Under 20 ms | Very fast response |
| 20–50 ms | Fast response |
| 50–100 ms | Moderate response |
| 100–200 ms | Slower response |
| Over 200 ms | High response time |
These ranges are general guidance, not universal standards. DNS performance depends on your location, network, resolver, caching, routing, and test method.
Why Is DNS Speed Important?
DNS is normally only one part of loading a website.
A browser must first find the correct IP address and then establish a connection to the website’s server.
If DNS resolution is slow, it can add delay before the browser can continue with the next parts of the connection.
Cloudflare’s performance documentation separates DNS lookup time from other stages such as TCP connection, TLS negotiation, and server response time.
This means DNS speed is useful to measure, but it is not the same thing as your overall internet speed.
How Does DNS Work?
When you enter a website address into your browser, several steps can happen during DNS resolution.
In a typical uncached lookup, a recursive resolver may need to find information from different DNS servers before returning the final IP address.
The basic process is:
- You enter a domain name.
- Your device sends a DNS query.
- A DNS resolver receives the request.
- The resolver finds the required DNS information.
- The IP address is returned.
- Your browser can then continue connecting to the website.
Cloudflare describes DNS resolution as the process of translating a hostname into a computer-friendly IP address.
What Is a DNS Resolver?
A DNS resolver is the service that handles DNS lookup requests from your device.
Your internet connection may use a DNS resolver provided by your ISP, or your device/router may be configured to use another public DNS resolver.
The resolver receives your request and works out the DNS answer needed by your device.
A resolver can also use cached DNS information, which may make some lookups faster.
DNS Resolver vs Authoritative DNS
These two terms are easy to confuse.
| Type | Main Job |
|---|---|
| DNS Resolver | Finds DNS answers for users and applications |
| Authoritative DNS | Holds the official DNS records for a domain |
| DNS Record | Contains information such as an IP address or mail server |
| Nameserver | DNS server responsible for answering DNS queries |
Authoritative nameservers hold the definitive DNS records for a domain.
What Does a DNS Speed Test Measure?
A DNS Speed Test can measure the response time of DNS queries.
Depending on the tool, it may measure:
- DNS lookup time
- Resolver response time
- Multiple DNS providers
- Multiple domain lookups
- Average response time
- Fastest responses
- Slow responses
- Failed queries
A good test should make it clear what is actually being measured.
DNS Speed vs Internet Speed
DNS speed and internet speed are different.
| Measurement | What It Tells You |
|---|---|
| DNS Speed | How quickly DNS queries receive responses |
| Download Speed | How quickly data can be downloaded |
| Upload Speed | How quickly data can be uploaded |
| Ping | Network round-trip response time |
| Jitter | Variation in latency |
| Packet Loss | Percentage of packets that fail to arrive |
You can have fast internet with a relatively slow DNS resolver.
You can also have a fast DNS resolver while having a slow broadband connection.
That is why these measurements should not be treated as the same thing.
How to Use a DNS Speed Test
Using the DNS Speed Test is simple.
Step 1: Open the DNS Speed Test
Open the DNS Speed Test tool on Speed Test UK.
Step 2: Start the Test
Start the test and allow it to complete.
Step 3: Review the DNS Response
Look at the response time shown in milliseconds.
Step 4: Compare Results
If your tool tests multiple DNS resolvers, compare their response times.
Step 5: Repeat the Test
Run the test again if the results look unusual.
DNS performance can change depending on network conditions, location, caching, and routing.
How to Get More Accurate DNS Test Results
For a useful comparison:
- Close unnecessary network-heavy applications.
- Avoid large downloads during the test.
- Test more than once.
- Test at different times.
- Use the same device for comparisons.
- Compare several DNS resolvers.
- Record the results.
- Do not judge DNS performance from only one test.
A single result is only a snapshot.
What Is a Good DNS Speed?
There is no single DNS response time that is perfect for every user.
A lower DNS response time generally means the resolver answered more quickly.
For example:
| Result | General Interpretation |
|---|---|
| 5 ms | Extremely quick response |
| 15 ms | Very quick response |
| 30 ms | Quick response |
| 60 ms | Moderate response |
| 120 ms | Relatively slow |
| 250 ms | High response time |
However, these numbers should be treated as general examples rather than strict pass/fail limits.
Your location and network route can have a major effect on DNS response time.
Does Faster DNS Make the Internet Faster?
Not necessarily.
Changing DNS does not increase your broadband package speed.
For example, changing your DNS resolver will not turn a 100 Mbps connection into a 500 Mbps connection.
DNS mainly affects the process of finding the destination for a domain.
Once the website connection is established, other factors such as server performance, network latency, connection speed, page size, and content delivery can affect how quickly the page loads.
Can DNS Affect Website Loading Time?
Yes, DNS resolution can be one part of the overall website-loading process.
If DNS lookup takes longer, the browser has to wait longer before it can continue with the connection.
However, DNS is only one part of the process.
Cloudflare’s troubleshooting documentation breaks website request timing into areas such as DNS lookup, TCP connection, TLS handshake, time to first byte, and total time.
This is important because a slow website is not automatically caused by DNS.
DNS Cache and Speed
DNS caching can make repeated lookups faster.
Your browser, operating system, router, or DNS resolver may temporarily store DNS information.
When cached information is available, a new lookup may not need to perform the complete resolution process again.
This is one reason why DNS test results can vary between different requests.
Why Is My DNS Test Result Different Each Time?
It is normal for DNS measurements to change.
Possible reasons include:
- Network congestion
- Resolver load
- DNS caching
- Different routing
- Temporary network conditions
- Different test domains
- WiFi conditions
- Distance to the resolver
Cloudflare notes that performance measurements can vary because of network conditions and routing.
For this reason, it is better to compare multiple tests instead of relying on one measurement.
Does DNS Speed Depend on Location?
Yes.
Your physical location can affect the network path to a DNS resolver.
A resolver that is close to you may have a shorter network path than one that is much farther away.
Large DNS providers often operate distributed networks to serve users from different locations.
Cloudflare, for example, explains that its global network is designed to provide DNS responses from locations close to users.
This does not mean the same DNS provider will always be fastest for every person.
Why Is My DNS Slow?
Several things can contribute to slow DNS responses.
Slow Resolver
The DNS resolver itself may respond slowly.
Network Problems
Your connection to the resolver may have high latency or packet loss.
WiFi Problems
Poor WiFi conditions can affect communication between your device and the network.
Congestion
Busy network conditions can increase response times.
Long Network Route
A DNS resolver that is farther away may require a longer network path.
DNS Configuration Problems
Incorrect DNS settings can sometimes cause resolution problems.
Cloudflare lists incorrect DNS records, missing records, nameserver issues, and unresolved addresses among possible causes of DNS resolution problems.
Can Changing DNS Improve Browsing?
It can sometimes improve the DNS lookup portion of the connection if your current resolver is slow or unreliable.
However, changing DNS does not guarantee that every website will load faster.
Website performance also depends on:
- Your broadband connection
- WiFi
- Network latency
- Website hosting
- Server response
- Page size
- Content delivery
- Browser performance
DNS is only one piece of the complete process.
How to Change Your DNS Server
DNS settings can normally be changed on a device or router.
The exact steps depend on your operating system, router, and network setup.
Before changing DNS settings:
- Write down your current settings.
- Choose a DNS provider you trust.
- Enter the DNS addresses carefully.
- Save the settings.
- Test your connection.
- Run another DNS Speed Test.
If a change causes problems, you can return to your previous DNS configuration.
Should You Use Your ISP DNS?
Using your ISP’s DNS resolver is not automatically bad.
Your ISP may provide a DNS service that works well for your location.
The useful approach is to measure your actual experience rather than assuming that a particular DNS provider is always faster.
A DNS Speed Test can help you compare response times from your own network.
Public DNS Services
There are several public DNS services available.
Examples include services operated by:
- Cloudflare
- Quad9
- Other DNS providers
Each service can have different network locations, features, policies, and performance for different users.
Do not assume that one DNS provider will always be the fastest everywhere.
The best comparison is based on measurements from your own location and network.
DNS Speed Test for Gaming
DNS is involved when your device needs to resolve a domain or service address.
A faster DNS response can reduce the time needed for DNS lookup, but changing DNS does not automatically reduce the ongoing latency of your game connection.
Gaming performance also depends heavily on:
- Ping
- Jitter
- Packet loss
- Server location
- Network routing
- WiFi quality
For gaming problems, test more than DNS alone.
DNS Speed Test for Streaming
DNS can be involved when your device connects to a streaming service.
However, streaming quality mainly depends on the connection between your device and the service, available bandwidth, server selection, network conditions, and other factors.
A DNS test should therefore be viewed as one diagnostic tool rather than a complete streaming performance test.
DNS Speed Test for Websites
Website owners can also benefit from understanding DNS performance.
DNS affects how visitors find a website’s server.
Authoritative DNS services provide the DNS records that tell resolvers where a domain’s resources can be found.
For website owners, DNS reliability can therefore be important for availability as well as performance.
DNS Errors and Troubleshooting
DNS problems can produce browser errors such as:
- This site can’t be reached
- DNS resolution errors
- Server not found
ERR_NAME_NOT_RESOLVED
Cloudflare lists these among common DNS-related browser errors.
If you experience a DNS problem, try:
- Check that the domain name is correct.
- Restart your router.
- Check your DNS settings.
- Try another DNS resolver.
- Test another website.
- Check whether the issue affects other devices.
- Check the domain’s DNS records if you manage the website.
DNS Speed Test vs Ping Test
These tests measure different things.
| Test | Main Purpose |
|---|---|
| DNS Speed Test | Measures DNS query response |
| Ping Test | Measures network round-trip latency |
| Jitter Test | Measures latency variation |
| Packet Loss Test | Checks lost packets |
| Internet Speed Test | Measures download and upload performance |
Using multiple tests can provide a better picture of your connection.
Important Points
- DNS translates domain names into IP addresses.
- A DNS Speed Test measures DNS response time.
- DNS speed is different from download speed.
- Lower DNS response time generally means a faster DNS response.
- DNS caching can change test results.
- Location can affect DNS performance.
- One DNS provider is not automatically fastest for everyone.
- Changing DNS does not increase your broadband package speed.
- DNS is only one part of website loading.
- Test multiple times before making conclusions.
- For connection problems, also check ping, jitter, packet loss, download speed, and upload speed.
Frequently Asked Questions
What is a DNS Speed Test?
A DNS Speed Test measures how quickly a DNS resolver responds to DNS queries. Results are usually shown in milliseconds.
What is DNS?
DNS stands for Domain Name System. It translates human-readable domain names into IP addresses that computers use to locate internet services.
What is a good DNS response time?
A lower response time is generally better. Very low millisecond results are usually considered fast, but there is no single universal number that is perfect for every network.
Does DNS affect internet speed?
DNS does not normally increase your broadband download or upload speed. It can affect how quickly DNS resolution happens before a connection to a website or service is established.
Can changing DNS make websites load faster?
It can sometimes reduce DNS lookup delay if your existing resolver is slower. However, website loading also depends on many other factors.
Why does my DNS speed change?
DNS results can change because of caching, network conditions, routing, resolver load, WiFi conditions, and the domain being tested.
Which DNS server is the fastest?
There is no single DNS provider that is always fastest for every location. Testing from your own network provides more useful information.
Is DNS speed important for gaming?
DNS can affect the initial lookup of a service, but ongoing gaming performance is more closely related to ping, jitter, packet loss, routing, and server location.
Does DNS affect ping?
Changing DNS does not directly change the physical distance to a game server or automatically reduce network latency. It mainly changes how domain names are resolved.
Can slow DNS cause websites not to open?
DNS problems can prevent a browser from finding the correct server address. DNS resolution errors can result in messages such as “This site can’t be reached” or ERR_NAME_NOT_RESOLVED.
Should I test DNS more than once?
Yes. Running several tests can give you a better idea of typical DNS performance than relying on one result.
Final Thoughts
DNS works quietly in the background every time you access many websites and online services.
A DNS Speed Test helps you understand how quickly DNS queries are being answered by your current resolver.
Remember that DNS speed is only one part of internet performance. A fast DNS response does not automatically mean that your broadband connection, WiFi, website server, or gaming connection will be fast.
For a more complete connection check, combine your DNS results with download speed, upload speed, ping, jitter, and packet loss tests.
If your DNS results are consistently slow or you experience DNS errors, comparing another trusted resolver and checking your network settings can be useful troubleshooting steps.
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