How do I flush the DNS on my computer?

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Most operating systems and DNS clients will automatically cache IP Addresses and other DNS results, in order to speed up the site loading times. When a DNS record is changed old DNS record will be cached and therefore need to be cleared from the cache in order for you to communicate with the server correctly. The following steps will allow you to flush the DNS for your respective operating system:


Windows

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

Mac

  • Mountain Lion or Lion

If you are running Mac OS X 10.7 or 10.8, you need to do the following:

  1. Open up the command terminal.
  2. Run the command sudo killall -HUP mDNSResponder
  • Snow Leopard

If you are running Mac OS X 10.6, you need to do the following:

  1. Open up a command terminal.
  2. Run the command dscacheutil -flushcache
  • Leopard and below

If you are running Mac OS X 10.5.1 or below, you need to do the following:

  1. Open a command terminal.
  2. Run the command lookupd -flushcache
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