The information about the servers hosting DFS Root/Namespace is located at the following location
DFS
<Domain Partition>\System\Dfs-Configuration\<DFS Root>\Property\remoteServerName
DFSN
<Domain Partition>\System\Dfs-Configuration\<ms-DFSNamespaceAnchor>\<msDFSE-Namespacev2>\Property\msDFS-TargetListv2
msDFS-TargetListv2
In this object is an attribute named msdfs-targetlistv2 is where we store the info for the namespace servers. The attribute is a blob so its not in a readable format. You can although take a ldifde dump to view the blob