Just bad typing on my part. It is 428448 and comes from the Rand McNally Walmart 2009 special edition, so it is an open public code (nothing to clip and show).
The thing I questioned is that while this is what Mousesavers says of that rate. I was not able to find the code anywhere in our Rand McNally WalMart road atlas. I think it may have been in a past edition, just not the new one. Or I am not looking in the right place.