Wee-Allis, those are the operating and fuel permits needed for each state the truck can operate in. The majority of the numbers are the operating permit numbers. BUT if you look at the front bumper you will see it full of licence plates, which were the fuel tax plates for each state. Yeah, the good ole US of A had a lot of weird regulations and until the early 80's each state was pretty much able to do what they wanted to collect money from the truckers!! And since that was a household moving outfit he must have had them for most of the main 48..