You can sort and filter the subscriber list by their extension. This feature is also applicable for remote subscribers.
To list administered messaging subscribers:
Procedure
Log in to the Messaging web page.
Under Messaging Administration, select Subscriber Management.
The system displays the Manage Subscribers page.
Click Filter to view the Sort and Filter Local Subscribers page.
Alternatively, click Manage, and then click Sort and Filter Subscribers.
The system displays the Sort and Filter Local Subscribers page.
Select Extension and make it the primary sort key or secondary sort key.
The Primary column determines the first sort key in ascending or descending order. The Secondary column determines the second sort key, in case there are ties in the primary sort.
Enter extensions in the From and To columns for beginning and end of the included range.
Click Save.
The system displays the changed sort order in the subscriber list.