How To Clear Your DNS Cache

Overview:

Your DNS cache stores the locations (IP addresses) of webservers that contain pages which you have recently viewed. If the location of the web server changes before the entry in your DNS cache updates, you will be unable to access the site. So you may need to clear your DNS cache. Once you clear your DNS cache, your computer will query nameservers for the new DNS information.

To clear your DNS caches, please follow the next steps that support your operating system:

Windows Vista / Windows 7 Flush DNS

  • Click the start button and navigate to the command prompt (Start > All Programs > Accessories > Command Prompt)
  • Make sure that you right click on the command prompt application and choose “Run as Administrator
  • Type in the command ipconfig /flushdns

 

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Note: It is also possible to type in cmd into the Windows Vista / Windows 7 start menu search field and then right click on the cmd.exe result instead of having to navigate through the various sub menus.

Windows 8 / Windows 8.1 Flush DNS

  • Ensure that you’re on the Windows 8 Start Screen.
  • Simply type cmd and the Windows search bar will appear on the right hand side with search results.
  • Right click on Command Prompt and click Run as administrator.
  • Type in the command ipconfig /flushdns

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MacOS® 10.7 and 10.8

  • Click Applications.
  • Click Utilities.
  • Double-click the Terminal application.
  • Type the following command: sudo killall -HUP mDNSResponder

Warning: To run this command, you will need to know the computer’s Admin account password.
MacOS 10.5 and 10.6

  • Click Applications.
  • Click Utilities.
  • Double-click the Terminal application.
  • Type the following command: sudo dscacheutil -flushcache

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