Question: How do I update my name servers on domains that I registered at WPBlogSupport?
Answer: You can still control the domains you have purchased at FullContact even if you are hosting sites with another web host. Here's how....
Login to the client area.
https://wpblogsupport.com/members/clientarea.php and click on the "my domains" tab.
From there you can view the details of the domain including changing the name servers.