📅 February 02, 2026
⏱ 10 min read
Web & Networking

How to Debug DNS_PROBE_FINISHED_NXDOMAIN Error

Provides a step-by-step guide to troubleshoot and resolve the `DNS_PROBE_FINISHED_ │ NXDOMAIN` error, covering common causes from typos to DNS server issues.

⭐ Beginner

The DNS_PROBE_FINISHED_NXDOMAIN error indicates that the Domain Name System (DNS) probe finished with a "Non-Existent Domain" status. This means your browser couldn't find the IP address associated with the domain name you tried to access. Here's a comprehensive guide on how to debug it:

1. Check for Typos in the URL

  • The most common cause is a simple typo in the domain name. Double-check the URL for any spelling mistakes, extra characters, or missing parts.

2. Clear Browser DNS Cache

  • Your browser stores a local cache of DNS lookups. A stale or corrupted entry can cause this error.
    • Chrome: Open chrome://net-internals/#dns in your browser, then click "Clear host cache."
    • Other Browsers: Refer to your browser's documentation for clearing its DNS cache.

3. Flush Operating System DNS Cache

  • Your operating system also maintains a DNS cache.
    • Windows: Open Command Prompt as administrator and run ipconfig /flushdns.
    • macOS: Open Terminal and run sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder.
    • Linux: The command varies depending on your distribution and DNS resolver. Common commands include sudo systemd-resolve --flush-caches or sudo /etc/init.d/nscd restart.

4. Restart Your Router/Modem

  • Your router also caches DNS information. Power cycling it can clear this cache and resolve temporary network issues. Unplug it for about 30 seconds, then plug it back in and wait for it to fully restart.

5. Check Your Internet Connection

  • Ensure you have an active internet connection. Try accessing other websites to confirm.

6. Try a Different Browser or Device

  • This helps determine if the issue is specific to your browser or device, or if it's a broader network problem.

7. Disable VPN or Proxy

  • If you're using a VPN or proxy server, try disabling it temporarily. These services can sometimes interfere with DNS resolution.

8. Change DNS Servers

  • Your internet service provider (ISP) automatically assigns DNS servers. These can sometimes be slow, unreliable, or have issues. You can try switching to public DNS servers like Google DNS or Cloudflare DNS.
    • Google DNS: Primary: 8.8.8.8, Secondary: 8.8.4.4
    • Cloudflare DNS: Primary: 1.1.1.1, Secondary: 1.0.0.1
  • How to change DNS servers:
    • Windows: Go to Network and Sharing Center > Change adapter settings > Right-click your active connection > Properties > Internet Protocol Version 4 (TCP/IPv4) > Properties > "Use the following DNS server addresses."
    • macOS: Go to System Preferences > Network > Select your active connection > Advanced > DNS tab > Click the "+" to add new DNS servers.
    • Linux: This varies by distribution, but often involves editing /etc/resolv.conf or network manager settings.

9. Check Your hosts File

  • The hosts file is a local file that maps domain names to IP addresses. A misconfigured entry can override DNS lookups.
    • Windows: C:\Windows\System32\drivers\etc\hosts
    • macOS/Linux: /etc/hosts
  • Open it with a text editor (as administrator/root) and ensure there are no entries related to the problematic domain.

10. Contact the Website Administrator

  • If the issue persists only with a specific website, it's possible there's a problem with the website's DNS records or server. Contact the website administrator to inform them of the issue.

11. Contact Your ISP

  • If none of the above steps work and you're experiencing the issue with multiple websites, there might be a problem with your ISP's DNS service or your internet connection.

By systematically going through these steps, you should be able to identify and resolve the DNS_PROBE_FINISHED_NXDOMAIN error.