Have you ever tried to visit a website and suddenly received the message “This site can’t be reached” followed by DNS_PROBE_FINISHED_NXDOMAIN?
Don't panic. This error is related to DNS resolution, which is the process your device uses to find the server associated with a domain name.
In this guide, we'll explain what DNS_PROBE_FINISHED_NXDOMAIN means, why it happens, and how to troubleshoot it step by step.
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What Does DNS_PROBE_FINISHED_NXDOMAIN Mean?
DNS stands for Domain Name System. In simple terms, DNS helps translate a human-readable domain name such as example.com into the IP address of the server where the website is hosted.
The term NXDOMAIN means “Non-Existent Domain.” It indicates that the DNS lookup did not find a matching domain or DNS information for the requested address.
Your browser asked DNS, “Where is this website?” but the DNS lookup could not find the requested domain or DNS information.
Why Does DNS_PROBE_FINISHED_NXDOMAIN Happen?
There is no single cause for this error. The problem can originate from your computer, your network, the DNS resolver you are using, or the domain's DNS configuration.
- The website address was typed incorrectly.
- Your computer has outdated DNS cache information.
- Your DNS server is having problems resolving the domain.
- Your network or Internet connection is causing DNS problems.
- The domain's nameservers are incorrect.
- An A record or CNAME record is missing or incorrect.
- The domain has expired or is not properly registered.
- DNS settings were recently changed.
The important point is to diagnose the problem before changing settings randomly.
Step 1: Check the Website Address
Before trying technical solutions, carefully check the URL in your browser's address bar.
Make sure the domain name is spelled correctly, including its extension, such as .com, .net, or another domain extension.
Incorrect:
examplle.comCorrect:
example.com
A simple typing mistake can cause DNS_PROBE_FINISHED_NXDOMAIN because DNS is trying to find a domain that does not exist.
Step 2: Find Out If the Problem Is Only on Your Computer
The next step is to determine whether the problem is local to your computer or whether the website itself has a DNS problem.
Try the following:
- Open the website in another browser.
- Try accessing it from your phone.
- Use mobile data instead of Wi-Fi.
- Try another Wi-Fi or Internet connection.
If the website works on another device or network, the problem may be related to your computer, network, or DNS resolver.
If the website fails everywhere, the problem may be related to the domain or its DNS configuration.
Step 3: Flush the DNS Cache on Windows
Windows stores DNS information temporarily in a local cache. If that information becomes outdated or incorrect, clearing the cache can help.
To flush the DNS cache:
- Open the Windows Start menu.
- Search for Command Prompt.
- Open Command Prompt.
- Enter the following command:
Press Enter.
Windows should confirm that the DNS Resolver Cache was successfully flushed.
After that, try loading the website again.
Step 4: Try a Different DNS Server
If clearing the DNS cache does not solve the problem, you can test a different DNS resolver.
Two commonly used public DNS services are:
| DNS Provider | Primary DNS | Secondary DNS |
|---|---|---|
| Cloudflare | 1.1.1.1 | 1.0.0.1 |
| 8.8.8.8 | 8.8.4.4 |
On Windows, DNS settings can be changed through your network settings. After changing the DNS server, try opening the website again.
If the DNS resolver provided by your network is having trouble resolving the domain, testing another resolver can help determine whether the problem is related to DNS resolution.
Step 5: Check DNS Resolution with NSLOOKUP
Windows includes a useful command-line tool called nslookup. It can help you determine whether DNS is resolving a domain.
Open Command Prompt and enter:
Replace example.com with the domain you are having trouble accessing.
The command will return information about the DNS server being used and the address returned for the domain.
If the domain cannot be resolved, this can provide an important clue about where the problem is occurring.
Step 6: If You Own the Domain, Check Your DNS Configuration
If you are the owner of the domain and the error occurs for everyone, the problem may be related to the domain's DNS configuration.
Check the following items:
- Domain registration: Make sure the domain is active.
- Expiration: Confirm that the domain has not expired.
- Nameservers: Verify that the correct nameservers are configured.
- A record: Make sure the domain points to the correct IP address.
- CNAME record: Check important subdomains such as
www. - Hosting: Confirm that your hosting service is active.
Do not change nameservers or DNS records unless you understand what they are supposed to point to. Incorrect DNS changes can make a working website inaccessible.
Example: Your Website Works Without “www” but Not With “www”
Imagine that:
www.example.com → DNS_PROBE_FINISHED_NXDOMAIN
In this situation, the www subdomain may not have a valid DNS record.
Check the DNS configuration and verify that the appropriate CNAME or other required record exists for the www hostname.
Example: You Recently Changed Your DNS
If you recently changed your nameservers or DNS records, the new configuration may not be visible everywhere immediately.
DNS changes can take time to become available across different DNS resolvers and networks.
During this period, some users may be able to access the website while others still receive DNS errors.
If you have just changed your DNS configuration, avoid making repeated changes simply because the website does not immediately work everywhere. First verify that the configuration itself is correct.
What If Nothing Works?
If you have completed the troubleshooting steps and the domain still returns DNS_PROBE_FINISHED_NXDOMAIN, try to identify where the failure occurs.
- Test the domain from another device.
- Test another Internet connection.
- Check the domain registration status.
- Verify the nameservers.
- Review the A and CNAME records.
- Use
nslookupto test DNS resolution. - Contact your domain registrar or DNS provider if necessary.
If you do not control the domain, there may be nothing you can change locally. In that situation, the website owner or domain administrator may need to correct the DNS configuration.
A Simple DNS_PROBE_FINISHED_NXDOMAIN Checklist
☐ Check the website URL
☐ Try another browser
☐ Test another device
☐ Try another Internet connection
☐ Flush the Windows DNS cache
☐ Test another DNS server
☐ Run nslookup
☐ Check domain registration
☐ Verify nameservers
☐ Check A and CNAME records
☐ Contact the registrar if necessary
Final Thoughts
The DNS_PROBE_FINISHED_NXDOMAIN error can look intimidating, but the underlying problem is often easier to understand once you know how DNS works.
Start with the simplest checks: verify the URL, test another device or network, and clear your DNS cache. If the problem continues, investigate the DNS resolver and, if you own the domain, review its DNS configuration.
The key is not to change settings randomly. Instead, determine whether the problem is local, network-related, DNS-related, or associated with the domain itself.
At IANOVATECH, our goal is simple: help you understand the technology behind the problem so you can apply the right solution.
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Sources & Further Reading
- Cloudflare — DNS_PROBE_FINISHED_NXDOMAIN troubleshooting
- Cloudflare — DNS troubleshooting and common DNS issues
- Microsoft — Windows DNS troubleshooting guidance
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