Belgrano Cargas S.A. was an Argentine State-owned company which operated the 10,841 km (6,736 mi) 1,000 mm metre gauge gauge freight rail network built by Central Northern and Province of Santa Fe Railways, which became part of Belgrano Railway network after railway nationalization of 1948.

Ferrocarriles Argentinos was a state-owned company that managed the entire Argentine railway system for nearly 45 years. It was formed in 1948 when all the private railway companies were nationalised during Juan Perón's first presidential term, and transformed into the Empresa de Ferrocarriles del Estado Argentino.