Clearing DNS Cache for Mac or Windows

This article provides a guide for Clearing DNS Cache for Mac or Windows. You may find need to clear DNS cache of your system to access web services that have recently undergone DNS records modification or have changed their Nameservers.

What is DNS Cache?

Your DNS cache stores the locations (IP addresses) of web servers that contain web pages which you have recently viewed. If the location of the web server changes before the entry in your DNS cache updates, you can no longer access the site.

When Should We Clear DNS Cache?

If you encounter a large number of HTML 404 error codes, you may need to clear your DNS cache. After you clear your DNS cache, your computer will query nameservers for the new DNS information.

How to clear your DNS cache

The following methods allow you to remove old and inaccurate DNS information that may result in 404 errors.

Windows® 8

To clear your DNS cache if you use Windows 8, perform the following steps:

  1. On your keyboard, press Win+X to open the WinX Menu.
  2. Right-click Command Prompt and select Run as Administrator.
  3. Run the following command:

    ipconfig /flushdns

    If the command succeeds, the system returns the following message:

    Windows IP configuration successfully flushed the DNS Resolver Cache.

Windows 7

To clear your DNS cache if you use Windows 7, perform the following steps:

  1. Click Start.
  2. Enter cmd in the Start menu search text box.
  3. Right-click Command Prompt and select Run as Administrator.
  4. Run the following command:

    ipconfig /flushdns

    If the command succeeds, the system returns the following message:

    Windows IP configuration successfully flushed the DNS Resolver Cache.

Windows XP, 2000, or Vista®

To clear your DNS cache if you use Windows XP, 2000, or Vista®, perform the following steps:

  1. Click Start.
  2. On the Start menu, click Run....
    • If you do not see the Run command in Vista, enter run in the Search bar.
  3. Run the following command in the Run text box:

    ipconfig /flushdns

    If the command succeeds, the system returns the following message:

    Successfully flushed the DNS Resolver Cache.

MacOS® 10.10.4 and above

To clear your DNS cache if you use MacOS X version 10.10.4 or above, perform the following steps:

  1. Click Applications.
  2. Click Utilities.
  3. Click Terminal.
  4. Run the following command:

    killall -HUP mDNSResponder

    If the command succeeds, the system does not return any output.

    Warning:

    To run this command, you must know the computer's administrator account password.

MacOS® 10.10.1, 10.10.2, and 10.10.3

To clear your DNS cache if you use MacOS X version 10.10 through 10.10.3, perform the following steps:

  1. Click Applications.
  2. Click Utilities.
  3. Click Terminal.
  4. Run the following command:

    discoveryutil mdnsflushcache

    If the command succeeds, the system does not return any output.

    Warning:

    To run this command, you must know the computer's administrator account password.

MacOS 10.7, 10.8, and 10.9

To clear your DNS cache if you use MacOS X version 10.7, 10.8, or 10.9, perform the following steps:

  1. Click Applications.
  2. Click Utilities.
  3. Double-click Terminal.
  4. Run the following command:

    killall -HUP mDNSResponder

    If the command succeeds, the system does not return any output.

    Warning:

    To run this command, you must know the computer's administrator account password.

MacOS 10.5 and 10.6

To clear your DNS cache if you use MacOS X version 10.5 or 10.6, perform the following steps:

  1. Click Applications.
  2. Click Utilities.
  3. Double-click Terminal.
  4. Run the following command:

    sudo dscacheutil -flushcache

    If the command succeeds, the system does not return any output.

Conclusion

You know have the skills to clear DNS cache on the most commonly used personal desktop and laptop computer environments.

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