What does DNS_PROBE_FINISHED_NXDOMAIN mean?

The short answer

DNS_PROBE_FINISHED_NXDOMAIN means your browser looked up the website address and the domain simply doesn’t exist — or your device thinks it doesn’t.

What’s actually happening?

When you type a web address, your device asks a DNS server to translate that name into a number (an IP address). “NXDOMAIN” stands for “Non-Existent Domain” — the DNS server checked and came back saying, “I have no idea what that is.”

This doesn’t always mean the site is truly gone. It often means something on your end is preventing the lookup from working correctly.

Common causes

  • You mistyped the URL — the most frequent cause by far
  • The website no longer exists — the domain registration may have expired
  • Your DNS cache is outdated — your device is remembering old, incorrect information
  • Your DNS server is having issues — your internet provider’s DNS may be acting up
  • A VPN or proxy is interfering — these can redirect DNS lookups and cause failures
  • Your hosts file has a bad entry — someone (or some software) added an override that’s blocking the site

How to fix it

  1. Double-check the URL — look carefully for typos or extra characters
  2. Try the site on your phone (using mobile data) — if it loads, the problem is your network, not the site
  3. Flush your DNS cache:
    • Windows: open Command Prompt and run ipconfig /flushdns
    • Mac: open Terminal and run sudo dscacheutil -flushcache
  4. Switch your DNS server — change to Google (8.8.8.8) or Cloudflare (1.1.1.1) in your network settings
  5. Disable your VPN or proxy temporarily — see if that resolves it
  6. Restart your router — unplug for 30 seconds, then plug back in

When should you worry?

This error is almost always harmless and fixable. But take note if:

  • Every site gives this error — your DNS settings or internet connection may be broken
  • It started after installing new software — that software may have changed your network settings or hosts file
  • A site you own shows this — your domain may have expired, and you should check with your registrar immediately