thanks for the clarification and for your service.
if I remember correctly, using services such as "track17", both codes are read "automatically" and from there it is possible to trace the entire route of the shipment...both in USA and outside (if the shipment is already out of USA)....
Ah yes.. good reminder...
https://www.17track.net/en is a good tracking service for any shipping service
I know that sometimes USPS.com doesn't give the best information