List of locomotive and multiple unit classes of SNCF. Classes in bold are in use, whilst those in italics have been withdrawn. Numbering Scheme Locomotives and Multiple Units Vehicle numbers are three to six digits long. The first (not always present) digit indicates the sector in which that vehicle operates: 1: SNCF Voyages: high-speed services, including the TGV 2: Intercités: medium-distance services 4: SNCF Fret: freight operations 5: Transport Express Régional (TER): urban, local and regional services 6: SNCF Infra: maintains rail infrastructure, the assets of Réseau ferré de France (RFF) 7: Departmental use 8: Transilien: commuter services serving Île-de-France The next (possibly first) two or three digits of a vehicle's number indicate its class, in loose bands corresponding to the traction and power output of the stock: 0-9999: DC Electric 10000-19999: AC Electric 20000-29999: Dual Voltage 30000-39999: Triple Voltage 40000-49999: Quadruple Voltage 60000-79999: Diesel The final digits uniquely identify the engine within its class, but in the case of a three digit class number, the engine number may begin adding to the class number (for example, a Class 22200 may have a number beginning 222, 223 or 224). Multiple units are numbered the same as locomotives, but prefixed by X for DMUs or Z for EMUs. Diesel shunters are prefixed Y. A now discontinued practice was to prefix the class number by the wheel arrangement. TGV numbering scheme Each TGV trainset has its own number, found on the nose. Within the set, each vehicle is given its own number. The power cars are numbered by the standard locomotive numbering scheme, prefixed by TGV. The trailers are given a number which consists of the first two digits of the power car's number, followed by the number of the trailer in the set, and finishing with the number of the trainset, prefixed by TGVR or TGVZR, if powered. Locomotives Electric locomotives DC BB 1-80 BB 100 BB 200 BB 300 BB 325 2D2 500 BB 800 BB 900 CC 1100 BB 1300 BB 1400 BB 1500 BB 1600 2BB2 3200 2BB2 3300 2CC2 3400 1ABBA1 3500 1ABBA1 3600 1CC1 3700 1CC1 3800 BB 4100 BB 4200 BB 4600 BB 4700 BB 4730 2D2 5000 2D2 5100 2D2 5200 2D2 5300 2D2 5400 2D2 5500 CC 6001 (Prototype loco) BBB 6002 (Prototype loco) BBB 6003 (Prototype loco) (ex-BBB 20003) CC 6500 CC 7000 (Prototype locos) BB 7003 (Prototype loco) (ex-BB 15007) CC