The Canadian National Railway Company, CN, is a Canadian Class I freight railway headquartered in Montreal, Quebec, which serves Canada and the Midwestern and Southern United States.

CN is Canada's largest railway, in terms of both revenue and the physical size of its rail network, spanning Canada from the Atlantic coast in Nova Scotia to the Pacific coast in British Columbia across approximately 20,400 route miles of track. In the late 20th century, CN gained extensive capacity in the United States by taking over such railroads as the Illinois Central.

Source: Wikipedia