Hi Rahul,
Can you please elaborate your requirement ?
Context node can be compared to a Internal table which hold the data.
if you really want to find where a particular context node is being used it will be kind of manual search where you would have to look into views and component/custom controller.
In a particluar view implemenation class you can go to attribute TYPED_CONTEXT and the find the context node class and do a where used list.
Hope this helps.
Thanks,
Poonam