I was on the Royal Mail project for this back in 2015. It's unfathomably complicated !!!! Will need a digital twin cache for the parcel, an event processor for scans and updates and a secure API layer available worldwide. Ironically, might be an interesting use-case for blockchain (!!)
oh yeah, I can well imagine the complexity that would underpin this! But if we can send humans to the moon, surely we can track a few parcels???
At the risk of sounding like a repetitive bore, this is the sort of thing that the spatial web standards will, in time, enable. i.e A universe of IDs, spatial tracking, governance...
We can dream, Rob