Hiding in Plain Sight: USPS International ZIP Barcodes

USPS International ZIP Barcodes first appeared in 1995 but they were not understood until 1999 when my paper was published listing the codes for all countries in the world. Subsequently, USPS expanded the numeric range and renumbered all countries. The journey is documented here.

Douglas B. Quine, Ph.D. | 2025-06-10

Frame 01

Page 0001.jpg
Page 0002.jpg
Page 0003.jpg
Page 0004.jpg
Page 0005.jpg
Page 0006.jpg
Page 0007.jpg
Page 0008.jpg