Mailing list records are treated as customer records, therefore the Mailing list can be viewed via the Customer Search area of the Admin Console.
To view just the customers that belong to a certain list go to Customers > Customer Search
On the Search page click the “Show Options” link.
Find the Option called “Mailing List”, select your mailing list (by default the system converted current lists into “InternalList”) and click Search. You also have the ability to filter with all of the other customer search options.
Finally, click the excel icon in the top menu bar to export the list of customers matching your mailing list and filtering options.