A DNS cache is a basically a captured extract of the DNS records for a website since you first visited it. This cache will refresh at a set interval depending on how this is saved to your device, your network, and your internet service provider. 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.

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How to clear your DNS cache

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Windows

  1. Open the Start Menu and search for cmd.
  2. Open the Command Prompt program.
  3. Type the following in the command window: ipconfig /flushdns
  4. Press the Enter key.

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macOS

  1. Navigate to Terminal.
  2. Type the following in the command window: dscacheutil -flushcache
  3. Press the Enter key.

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Linux

  1. Navigate to Terminal.
  2. Type the following in the command window: /etc/init.d/nscd restart
  3. Press the Enter key.
Note: If this does not resolve your issue, you may still need to wait up to 24-48 hours for the cache of your greater network (including your internet service provider) to refresh.