Train reporting numbers are used on Australian railway networks to help network operators, and other users, coordinate train movements and identify trains. The numbers are used similarly to airline flight numbers, and enable a train to be identified to network controllers and other relevant authorities, and are also used by train operators for internal train management purposes.
Although Australian train reporting number systems are based on the United Kingdom system, each state has developed its own numbering system, with some similarities and differences. They generally include an indication of an origin and/or destination of a train, but differ in the way they denote the various features of the train, such as the operator, the type of train, the type of load, and whether the train is travelling in an up or down direction.
To date, there has been no significant move towards standardisation of the numbering system.