How to Clean the DNS Cache


DNS stands for domain name system and is used to translate a domain name like to the IP address. Many workstation operating systems, such as Windows XP, cache the domain name and related IP address to speed up network calls. This works because the IP address a domain name translates to does not change frequently. Sometimes it is necessary to clear the cache when such a change does occur and you do not wish to wait for the cache to rebuild at some future time.

  • Click on the "Start" button on the Windows menu bar.

  • Select "All Programs," "Accessories," "Command Prompt."

  • Type the following text at the command prompt and press "Enter:"
    ipconfig /flushdns

  • The following message will be displayed: "Successfully flushed the DNS Resolver Cache."

  • Type the following at the command prompt to confirm the cache has been flushed of dns entries:
    ipconfig /displaydns

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