Most residential and general organizational telephone directories are not cataloged by the Library of Congress, even though the Library maintains a large collection of foreign and domestic directories. The uncataloged directories listed below reflect holdings as of June, 2003, although a few more recent volumes are in the Main Reading Room's reference collection.

Additional directories may be identified in the Library's online catalog. The arrangement below is chronological. The type of directory is indicated by the words "residential," "organizational," or "both" for directories that include both business and private numbers. To locate these directories, search the Library of Congress Online Catalog using subject keywords such as "Belgium" and "directories," or the name of a city plus "directories."

Besides telephone directories, this kind of search also yields business/address directories from Belgium. The directories are held in the John Adams building but may be requested in person via librarians in the European Reading Room located in the Thomas Jefferson building.