Discussion Forum: Thread 314877

 Author: cosmicray View Messages Posted By cosmicray
 Posted: Dec 27, 2021 08:01
 Subject: USPS zones matrix
 Viewed: 79 times
 Topic: Suggestions
 Status:Open
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cosmicray (3489)

Location:  USA, Florida
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https://postalpro.usps.com/national-zone-charts-matrix/ZoneChartsMatrixTechnicalGuide

The matrix to convert any USPS origination/destination Zip-code pair to a zone
number is 2 MB in size. That's it, for the entire country, plus a very small
exceptions file. This should be easy to implement, and requires no API calls
to make it work.

Nita Rae