Prefix or alphabetic part of an equipment unit's identifying number.

Sequencing or serial part of an equipment unit's identifying number (pure numeric form for equipment number is preferred).

Code maintained by AAR to identify a type of rail car or intermodal equipment type and its general physical characteristics; when using fewer than four characters, the value must include all of the leading or high order characters

Sequencing or serial part of an equipment unit's identifying number (pure numeric form for equipment number is preferred).

Association of American Railroads Mechanical Car Code