DNS_PROBE_FINISHED_NXDOMAIN means the browser could not resolve the requested hostname as expected. The useful question is where that failure occurs. A typo, a local cached answer, a network resolver or the domain’s authoritative configuration can lead a visitor toward a similar-looking error while requiring different action.
Start by comparing observations. Do not immediately reinstall WordPress, change nameservers or reset every network setting. A short sequence of checks can separate a problem affecting one computer from a problem that the domain owner must investigate.
Record the exact hostname
Copy the address from the browser and inspect it carefully. Check spelling, extra characters and the difference between the root domain and a subdomain such as www. A working root domain does not prove that every subdomain has a valid DNS record.
Test a familiar unrelated website as well. If many unrelated names fail, investigate the device or network before blaming one website. If only one hostname fails, preserve that fact in your notes. Record the time and the network used so another person can compare the same conditions.
A screenshot helps document the browser message, but also retain the address as text. This avoids a support conversation in which the person investigating accidentally tests a different hostname from the one that failed.
Compare another device and network
Try the same address on another device connected to the same network. Then, where available and appropriate, compare a different network such as a mobile connection. The purpose is to isolate a boundary, not to generate repeated changes on the original computer.
If every device on one network fails while a separate connection works, the local network’s resolver or configuration deserves attention. If the failure follows one computer across networks, investigate that computer’s settings. If independent networks all fail, ask the domain owner to inspect authoritative DNS and registration status.
These comparisons are evidence, not absolute proof. Cached answers and different resolver paths can produce temporary differences. Keep the sequence and timestamps so a later result can be interpreted alongside the earlier observations.
Inspect Windows information before clearing it
Microsoft documents the ipconfig command, including options to display the DNS resolver cache and clear it. On a computer you administer, use the documented commands to collect relevant information before making a change. Follow your organization’s IT process on managed devices.
The command ipconfig /displaydns displays cached resolver information, while ipconfig /flushdns clears the DNS resolver cache. Clearing a stale local answer can help in an appropriate case, but it does not repair a missing authoritative DNS record or renew an expired domain.
After a targeted change, repeat the same hostname test and record the result. Avoid combining several unrelated resets because success would then tell you little about which action mattered. Preserve the original configuration before changing network settings.
Check who controls the domain
For a website you own, identify the registrar, authoritative DNS provider and hosting provider. These may be different organizations. A hosting support agent cannot necessarily edit a DNS zone held elsewhere, and a WordPress administrator may not control either account.
Confirm the current nameservers and the expected records for the failing hostname through your authorized management interfaces. Review recent migrations, DNS changes and registration notices. If a record was removed, restore the correct known value from your configuration record rather than inventing an address.
Do not change nameservers merely because the website fails to load. That can affect email and other services using the same domain. Make changes only after identifying the intended authoritative provider and the full set of records that must remain available.
Distinguish DNS from later connection failures
DNS resolution happens before the browser can reach the intended web service. Once the hostname resolves, a different error may reveal a separate problem with connectivity, certificates or the application. Treat a changed error as new information rather than evidence that the first diagnostic step was useless.
For example, a certificate warning after repairing a missing hostname record means the browser has progressed further. The certificate must then be checked against that exact hostname. Installing a WordPress plugin would not have solved the original missing DNS answer.
Likewise, a website redirecting to an old domain is a different investigation. Canada Create™’s old-domain redirect guide explains why you should locate the responsible rule before editing application settings.
Escalate with a useful evidence package
Send support the failing hostname, timestamps, browser message and results from the device-and-network comparison. Include recent authorized changes and the expected DNS provider. Do not send passwords or publish sensitive network configuration in an open forum.
Ask a precise question: does the authoritative configuration contain the intended record, and do the observed answers match it? If your provider identifies a propagation or caching issue, ask which record changed and what observation will confirm resolution.
A vague instruction to “wait for DNS” is not a substitute for checking that the underlying configuration is correct. Waiting cannot make an incorrect record become the intended one. Conversely, repeatedly changing correct records can complicate an investigation already affected by caching.
Verify recovery and retain the cause
When the address resolves again, test the original device and network as well as an independent connection. Confirm the website reaches the expected destination and that related services still work. Record the actual repair, not merely the final successful screenshot.
Keep domain access, nameservers and essential records in a maintained handover document. The next incident becomes much easier when ownership and expected configuration are clear. The best NXDOMAIN response is a narrow diagnosis supported by comparisons, followed by the smallest justified correction.
If you do not own the failing website, limit your work to your device and connection. Send the evidence to its operator rather than attempting to alter a domain you do not administer or bypass a managed network policy.
Frequently Asked Questions
What does DNS_PROBE_FINISHED_NXDOMAIN mean?
Your browser could not find an IP address for the domain, because of a DNS issue on your device, network or the domain itself.
How do I fix it on Windows?
Flush the DNS cache, restart the router, change DNS servers and disable VPNs to test.
How do I know if the domain itself is the problem?
Test from another network or an online DNS checker. If it fails everywhere, check domain expiry and DNS records.
Who can fix domain and DNS problems?
Our web hosting team manages domains and DNS.
