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What is my DNS cache and how do I clear it from my computer?

Last updated: January 15, 2019

A DNS cache is a basically a stuck in time record of where your computer believes your website is; even though since you last looked at it, things may have changed.

If you have recently moved to us from another web host, migrated between servers or you’ve changed a DNS entry, you may need to clear your DNS cache to remove a stale DNS record.

Whilst clearing your DNS cache will more often than not correct a DNS related issue, if your ISP (internet service provider) still has a DNS cache of their own you will have to wait for that to flush as well and this is beyond your control.

To clear your computer’s DNS cache, follow the instructions below.


  1. Start > Run.
  2. Type in “cmd”, then click run.
  3. Type in the command window “ipconfig /flushdns” and press enter.
  4. Your computer’s DNS cache should now be cleared.


  1. Navigate to terminal.
  2. Type in “dscacheutil -flushcache” and press enter.


  1. Navigate to terminal.
  2. Type in “/etc/init.d/nscd restart” and press enter.

If completing the above steps does not have any effect you may need to wait for your ISP’s own DNS cache to clear. This will generally occur within 24-48 hours.

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