dns

How to Clear Your DNS Cache


Last modified: July 7, 2020

Overview

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.

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

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.
    • You can also right-click the Start button, and then click Run.
  2. Enter cmd and click OK.
  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.

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.

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.

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….
  3. If you do not see the Run command in Vista, enter run in the Search bar.
  4. 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.

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:
    sudo killall -HUP mDNSResponder
    
    If the command succeeds, the system does not return any output.
Warning:

To run the sudo killall -HUP mDNSResponder command, you must know the computer’s administrator account password.


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:
    sudo discoveryutil mdnsflushcache
    
    If the command succeeds, the system does not return any output.
Warning:

To run the sudo discoveryutil mdnsflushcache command, you must know the computer’s administrator account password.


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:
    sudo killall -HUP mDNSResponder
    
    If the command succeeds, the system does not return any output.
Warning:

To run the sudo killall -HUP mDNSResponder command, you must know the computer’s administrator account password.


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.
Warning:

To run the sudo dscacheutil -flushcache command, you must know the computer’s administrator account password.


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

  1. Open a new Chrome tab.
  2. Enter the following address
    chrome://net-internals
  3. Hit the Enter key.
  4. From the menu, select DNS.
  5. Click the Clear host cache button.

If the command succeeds, the system will perform any DNS lookups again.


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

  1. Run the following command:
    sudo systemd-resolve --flush-caches
  2. Run the following command:
    sudo systemd-resolve --statistics

If the command succeeds, it will return results with an empty cache.


To clear your DNS cache if you use CentOS, run the following command:

systemctl restart dnsmasq.service

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


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