Is the centralized DNS service available for my site?
To see if the centralized DNS service is the one you should use for any of your sites, go to Site Tools Dashboard > IP and Name servers box (in the Site Information section) and check the name server information listed there. If you have multiple sites, make sure that you have selected the right one from the site dropdown in the Site Tools header.
If the name servers listed for your site are ns1.siteground.net (75.2.77.104) and ns2.siteground.net (99.83.229.113), this means the new DNS service is available for this site and these Name Servers should be used for pointing to our servers.
If you see any other name servers listed there, this means that the centralized DNS service is still not available for your site and you should still use the name servers listed in the box to point to our servers.