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A ZIP Code (an acronym for Zone Improvement Plan [1]) is a system of postal codes used by the United States Postal Service (USPS). The term ZIP was chosen to suggest that the mail travels more efficiently and quickly [ 2 ] ( zipping along ) when senders use the code in the postal address .
There are generally two widely accepted versions of a postal code: a ZIP code and a ZIP + 4 code. Established in 1963, ZIP codes are the most common and recognizable postal code used by the USPS.
As a result, some addresses end up with a ZCTA code that is different from their ZIP code. ZCTAs are not developed for ZIP codes that comprise only a small number of addresses. [3] Several ZCTAs represent ZIPs that no longer exist due to realignment by the USPS. There are approximately 42,000 ZIP Codes and 32,000 ZCTAs.
The name of US postal codes, "ZIP Codes", reflects this evolutionary growth from a zone plan to a zone improvement plan, "ZIP". Modern postal codes were first introduced in the Ukrainian Soviet Socialist Republic in December 1932, [4] but the system was abandoned in 1939. The next country to introduce postal codes was Germany in 1941, [5 ...
L002 3-Digit ZIP Code Prefix Matrix, Effective Date 2017-04-01, from USPS Facility Access and Shipment Tracking (FAST) L005 3-Digit ZIP Code Prefix Groups—SCF Sortation, Effective Date 2017-04-01, from USPS Facilities Access and Shipment Tracking (FAST) G030 Postal Zones; G042 Pricing and Classification Service Center
The last digit is usually 0, except for postal codes for PO Box number ranges, in which case it is 1. Country code for Finland: "FI". In Åland, the postal code is prefixed with "AX", not "FI". Some postal codes for rural settlements may end with 5, and there are some unique postal codes for large companies and institutions, e.g. 00014 ...
Allocations that don't fit the one-digit ZIP Code zone pattern go in the "exceptions" part: 04:47, 26 June 2007: 1,251 × 878 (319 KB) Denelson83: Allocations that don't fit the one-digit ZIP Code zone pattern go in the "exceptions" part: 04:39, 26 June 2007: 1,251 × 878 (319 KB) Denelson83: 34 not really visible; using no-break spaces: 04:35 ...
Compared with the national average, people who live in ZIP codes with the lowest diagnostic intensity — a measure of how often doctors offer tests and treatments to patients — are 28% less ...