Clear DNS Cache & Register Error Reporting

[amalan]

My PC shows DNS caching issues. Is it a big problem?

How to fix DNS Caching errors? I have a Windows 11 Dell PC.

[Alex George]

Many Internet connectivity issues are due to the corrupted DNS cache on a computer. This article explains the term DNS Cache and teaches you how to clear and renew it on a Windows computer.


What is DNS Cache?

Before explaining the term DNS Cache, you must understand DNS Server. DNS Server acts between your computer and the server on the Internet.

Let me explain it.

When you type www.SysToSys.com on the browser address bar, your computer does not understand the name of this blog.

Your computer understands only the IP address. So, it requests the DNS server to translate the domain name SysToSys.com and find the destination IP address.

Once your computer learns the IP address of the website www.SysToSys.com, it will save the information in the DNS Cache.

So, your computer does not want to contact the DNS Server the next time when you type www.SysToSys.com on the browser.

Now, you understand the term DNS Cache.

[Alex George]

Why Do We Need to Clear DNS Cache on a Computer?

DNS Cache will grow over time, and the chances of corruption are high. A corrupted DNS Cache will lead to a wrong IP address and confuse your computer.

It will lead to the error messages like DNS Server isn't Responding, or Ping Request Could Not Find Host. If your computer faces any such error, the solution is to clear the current DNS Cache.

Let us check how to clear DNS Cache on a computer and re-register it.

[Alex George]

How to Flush DNS Cache on a Computer?

We can clear the corrupted DNS Cache on a Windows computer using a single DOS Prompt command.

This Command is for Flushing the Current DNS Cache.

The command is:

Code: Select all

ipconfig /flushdns

To execute it, we need to start Command Prompt with administrative privileges. Let me explain the complete procedure to flush the DNS Cache on a Windows 11 laptop.

1. Start Windows Search (Press Windows and Q keys together ) and type Command Prompt.
2. Windows will show a link to run the Command Prompt as Administrator. Click the link.
   
   
3. Type the command to flush the DNS Cache on the Command Prompt.
   
   

   ipconfig /flushdns

4. Press the Enter button to execute the command.
5. Now you will see the result on the Command Prompt as below.
   

   Code: Select all

   Windows IP Configuration
   
   Successfully Flushed the DNS Resolver Cache.

   You can see the screenshot of the result below.
   
   

We have successfully cleared the current DNS Cache. Now, let us check how to register the DNS Names errors on your Windows laptop.

[Alex George]

How to Refresh & Register Future DNS Names Errors For Reporting?

You have learned how to flush DNS Cache on a Windows computer. Now, we will check how to refresh or register DNS names errors.

We can perform it on a Windows computer with the help of the following DOS command.

Code: Select all

ipconfig /registerdns

We need the DOS prompt with administrative privileges to execute this command. Let us check how to register DNS Names for error reporting.

1. Start Dos Prompt with administrative privileges.
2. Type the command on the DOS Prompt.
   

   ipconfig /registerdns

3. Now press the Enter key.

Windows will show you the following result.

Code: Select all

C:\Windows\system32>ipconfig/registerdns

Windows IP Configuration

Registration of the DNS resource records for all adapters of this computer has been initiated. Any errors will be reported in the Event Viewer in 15 minutes.

You can see the screenshot of the result below.



You can see any future DNS Name errors in the Microsoft event viewer.


Now you have learned how to flush DNS Cache on a Windows PC and register any DNS Name errors. Let us know your feedback about this guide.

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[Rody Wautier]

My PC shows DNS caching issues. Is it a big problem?

No, just purge the cache as Alex mentioned.