SNCF Class BB 27300 the number carried on the locomotive is prefixed with the number 8, to denote the unit as belonging to the Île-de-France division of SNCF. The first locomotives entered service in 2006 on suburban trains from Paris Montparnasse railway station. Current deployment sees a total of 25 locomotives operating services from Paris-Montparnasse on trains to Dreux, Mantes-la-Jolie and Rambouillet. At Montparnasse they have displaced older SNCF Class BB 8500 and BB 25500 locomotives. A further 42 locomotives operate from Paris Saint-Lazare railway station on trains to Poissy, Mantes-la-Jolie, Pontoise, Gisors, and Ermont Eaubonne. At Saint-Lazare BB 8500 and BB 17000 locomotives
SNCF historically significant: for the first time in the history of SNCF their headquarters is no longer located within the city limits of Paris. From 1999 to 2013, SNCF's headquarters were located in the Montparnasse neighborhood of the 14th arrondissement of Paris, located near the Gare Montparnasse. Prior to 1999, the SNCF's historic headquarters was located at 88 Rue Saint-Lazare in the 9th arrondissement. In 1996 the chairman of SNCF, Louis Gallois, announced that SNCF would move its headquarters to a new location during the middle of 1997. Since 1 January 2015 SNCF consists of three divisions: SNCF has full or