RFID in shipping stickers (UPS/Amazon) range?

Hey all,

For some reason, I just noticed that some of the smaller sticker labels on packages have an aluminum antenna and an RFID on the back, a layer below the adhesive part.

Brushing aside initial concerns, my guess is these are used for tracking in warehouses and/or read by the driver so that you can see exactly how close your package is for tracking.

My question is: What is the range an RFID reader can pick these up?

The …

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