What does 'DNS server not responding' mean?

The short answer

“DNS server not responding” means your device can’t reach the server that translates website names (like google.com) into the numeric addresses computers actually use. Without it, your browser doesn’t know where to go.

What is a DNS server?

Think of DNS as the phone book of the internet. When you type a website address, your device asks a DNS server to look up the actual location of that site. If that server doesn’t respond, your device is stuck — it has a name but no address to connect to.

Your internet connection itself might be perfectly fine. The problem is specifically with the lookup step.

Why does this happen?

  • Your router needs a restart — the most common cause is a temporary glitch in your home network
  • Your ISP’s DNS server is down — internet providers run their own DNS servers, and they sometimes go offline
  • Wrong network settings — your device may be configured with an incorrect DNS address
  • Firewall or antivirus interference — security software can sometimes block DNS requests
  • Outdated network drivers — on Windows especially, old drivers can cause DNS issues

How to fix it

  1. Restart your router and modem — unplug them for 30 seconds, then plug them back in
  2. Restart your device — clears temporary network problems
  3. Try a different browser — if it works elsewhere, the issue is browser-specific
  4. Switch to a public DNS server — change your DNS settings to Google (8.8.8.8) or Cloudflare (1.1.1.1) instead of your ISP’s default
  5. Flush your DNS cache — on Windows, open Command Prompt and run ipconfig /flushdns
  6. Disable your firewall temporarily — check if it’s the cause, then re-enable it

When should you worry?

Usually this is a temporary issue that a router restart fixes. But pay attention if:

  • It happens frequently — your ISP’s DNS servers may be unreliable, and switching to a public DNS is a permanent fix
  • Only certain sites fail to load — those specific sites may actually be down, not your DNS
  • It happens on all devices on your network — the problem is likely your router or ISP, not your device

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