[Solved] How to Clear DNS Cache to Fix HTML 404 Error

Problem: DNS cache stores the IP addresses of web servers that contain recently viewed web pages. If you encounter lot of HTML 404 error codes due to location of the web server changes before the entry in DNS cache updates, remove old and inaccurate DNS information that may result in 404 errors by using below method, computer will query nameservers for the new DNS information after clearing DNS cache.

Windows 8

Step 1: Press Win+X to open the WinX Menu.

Step 2: Right-click Command Prompt and select Run as Administrator.

Step 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

Step 1: Click Start.

Step 2: Enter cmd in the Start menu search text box.

Step 3: Right-click Command Prompt and select Run as Administrator.

Step 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

Step 1: Click Start.

Step 2: On the Start menu, click Run.

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

Step 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.

MacOS 10.10.4 and above

Step 1: Click Applications.

Step 2: Click Utilities.

Step 3: Click Terminal.

Step 4: Run the following command: sudo killall -HUP mDNSResponder

MacOS X version 10.10.1, 10.10.2 and 10.10.3

Step 1: Click Applications.

Step 2: Click Utilities.

Step 3: Click Terminal.

Step 4: Run the following command: sudo discoveryutil mdnsflushcache

MacOS X version 10.7, 10.8 and 10.9

Step 1: Click Applications.

Step 2: Click Utilities.

Step 3: Double-click Terminal.

Step 4: Run the following command: sudo killall -HUP mDNSResponder

MacOS X version 10.5 and 10.6

Step 1: Click Applications.

Step 2: Click Utilities.

Step 3: Double-click Terminal.

Step 4: Run the following command: sudo dscacheutil -flushcache