Yesterday I had changed one of my website’s DNS to new IP. Although the DNS changed but I couldn’t access the new webpage. After clear dns cache from my computer I could access it.

MacOS
Go to Applications.
Go to Utilities.
Open the Terminal application.
Type: dscacheutil -flushcache
Press Enter or Return, and your cache will be flushed.

Windows
Open the Start menu.
Go to Run.
In the Run text box, type: ipconfig /flushdns
Press Enter or Return, and your cache will be flushed.