I am not sure how it works, but i believe the VON # is given out when all the PRE BUILD paperwork is done
this is on the website
Your unique vehicle tracking number is the last 8 digits of the VIN (Vehicle Identification Number) or VON (Vehicle Order Number). Your VIN is provided in your second email update entitled, “Your new vehicle is scheduled for production.”
When the factory gives your Ram frame a place to fit into the line, you will get another email, if you signed up for email notifications
GT- Your right as far as I understand it. I was under the impression that I could enter my VON to check/see progress and the website simply tells me that it is unable to locate any information. I double checked my VON and it matches what is on the invoice.