The company that is hosting your Web site will provide you with the name servers (DNS) for your domain name. You can also choose not to host anywhere and park your domain name for free at DomainNameCom.com.
To modify, add, or delete name servers (DNS) for your domain(s):
Log in to the DomainNameCom.com Account Manager.
Select Manage Domains from the Domain Names dropdown menu or the Manage Your Account list.
Select the domain name you wish to modify using the checkboxes and then click Set Name Servers.
Enter your updated name server information in the spaces provided under the blue Name Servers heading on the right side of your page and click Save Changes at the bottom.
More about registering and managing domain names ...