The railway vehicle owner's code formed part of the vehicle number on the side of a railway coach or wagon. Until 2005 it was used to specify the owner of the wagon. However, the owner code did not necessarily reflect ownership of a vehicle but rather who had the right to use it. Since then the owner code has been replaced by the UIC country code. The keeper of a vehicle is now indicated with a Vehicle Keeper Marking (VKM). The table shows the former numbers used.

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