How to Clear DNS Cache in Windows
Launch the start menu by pressing the Windows key, then search for “CMD.” This returns the command prompt. Run the following command: ipconfig /flushdns. You will receive a confirmation that your DNS resolver cache has been flushed.
How to Clear DNS Cache on a Mac
To clear your DNS cache on a Mac, click “Go” in the toolbar and then “Utilities.” Open the Terminal, and run the following command: sudo killall -HUP mDNSResponder && echo macOS DNS Cache Reset. (You will need to be an admin to do this.) Then, try accessing the site again.