If you happen to have them all in a file already, use your favorite editor or scripting language to convert them into a list of QUERY commands like this:

    query * for [log in to unmask] 

and email that (as list owner) to the server.  Then you can look over the output, which will either report the subscription option settings, or say there is no subscription.  Use the listname instead of the asterisk if you really only want to check just one specific list, and not all lists for which you have authority.

>>> [log in to unmask] 03/26/03 02:50AM >>>
Those 100 addresses have no common domain or others, thay are all different between them.

By checking the addresses, I mean knowing if they are already subscribed to the list or not.