When you make changes to DNS you will notice that sometimes your computer is caching the old DNS information. This article is to help you speed up the process if the issue lies on your computer specifically.
In Vista, you may get an error "The requested operation requires elevation." when you try to use "ipconfig /flushDNS" such as the following screenshot:
- Open a command prompt by clicking start > click the search and type "CMD" and DO NOT hit enter.
- Right click "Command" and "Run as Administrator"
- In the command prompt, type "ipconfig /flushdns"
- Now see if you are able to see the correct DNS by pinging your domain which should resolve to the new IP in relation to the DNS changes you made.
If this didn't help, you may simply need to wait 12-24 hours for the DNS to propagate throughout the internet. One way to see if other servers on the internet are seeing the change, is by using a free tool: http://megaproxy.com/freesurf and typing in your domain.