Everything about Reporting Mark totally explained
A
reporting mark is an identification assigned by the
Association of American Railroads (AAR) to rail carriers and other companies operating in
North America.
Reporting mark standard practices
An AAR reporting mark is a sequence of two to four letters that uniquely identifies the owner of a piece of
railroad rolling stock. The ampersand symbol (&) isn't considered part of the reporting mark. When a new reporting mark is created, its first letter is selected to be the same as the first letter of the applying company's name; the remaining letters in a reporting mark are generally derived from the applying company's initials. For example, the reporting marks for which
Union Pacific Railroad (UP) applied all begin with the letter
U. As companies are merged, the companies' reporting marks are normally transferred to the resultant companies along with the original companies' trademarks and logos. The reporting marks that were assigned to
Chicago and North Western Railway (CNW), for example, are now assigned to UP which purchased CNW in the 1990s.
Marks that end in
X are assigned to rail car owners that are not
common carrier railroads themselves (typically these are private car owners, leasing companies or railroad museums). Marks that end in
Z are assigned to
trailer owners/operators for use on equipment that doesn't have flanged wheels but that will be used on North American railroads in
intermodal service. Marks that end in
U are assigned to
container owners/operators for use on equipment that will be used in intermodal service. Marks that end in any other letter are assigned to railroads for use on railroad equipment in interchange service.
List of AAR reporting marks
Where multiple railroads are listed on a reporting mark, their order indicates the order of the mark's assignment; the succession is usually through mergers or buyouts. When a railroad is issued a reporting mark, if it merges with another railroad, the surviving company is permitted to use the prior company's mark, but most railroads typically retire reporting marks of older railroads that they absorb. A reporting mark that's retired is colloquially referred to as a "fallen flag carrier".
Due to this list's size, it has been split into subpages based on the first letter of the reporting mark.
Further Information
Get more info on 'Reporting Mark'.
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