NYC,CHI, CUT was the old code that New York Central used for Cleveland not sure what Milliwalkie is these days nor South Bend IN. Theres gotta be something out there but Amtrak inherited a system that was already 60 years old when they got it. I could obsess with collecting Railroad and Steamship trunk tags but I need to know what to put on my bags these days
Just go to the Amtrak website and all the codes are there.