ZIP Code - Wikipedia
https://en.wikipedia.org/wiki/ZIP_code
OverviewOther usesHistoryStructure and allocationSee alsoExternal linksDelivery services other than the USPS, such as FedEx, United Parcel Service, and DHL, require a ZIP Code for optimal internal routing of a package. As of October 2019 , there are 41,702 ZIP Codes in the United States. Due to convenience, ZIP Codes are used not only for tracking of mail, but also commonly for gathering geographical statistics in the United States by some researchers. ZIP Codes are not created for statistical analy…
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