If your domain name is registered with Yahoo, please follow these steps to update your nameservers:
Log into the Domain Control Panel
Login to your Business Control Panel page
Click on the Manage My Services page
Select the Domain Control Panel
To update the nameservers:
Click the Manage Advanced DNS Settings link on your Domain Control Panel
Click the Change Name Servers button
Enter the exact nameservers we've provided
Click the Submit button
Your nameservers update will be processed within 3-6 hours. However, it may take up to 72 hours for it to be visible everywhere.