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AAR Reporting Marks Database


    Have you ever stood trackside, looking at freight cars, and wondered who owns them? Have you ever looked at those three and four letter designators on the sides of cars and wondered what they meant?

    These designators, like ICG, DODX, or ADMX, are called reporting marks. They are officially assigned designators of railroad equipment as registered with the Association of American Railroads (AAR).

    Below, the NRHS provides a way for you to look up reporting marks, by company/organization name, and by the reporting mark.

    NOTE: This is a historical database, and may not have the most recent changes in it. Odds are though that we'll have what you are looking for.

    Reporting Marks by Designator


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