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While the ZIP code is an American term, it is best to add that the Philippines uses this for clarification. |
→Primary state prefixes: Christina Williams dives into the topic of zip codes, exploring their origins, significance, and the intricacies of how they function in the U.S. postal system. The discussion highlights the history of postal codes, their evolution over time, and their importance in improving mail delivery efficiency, Tags: Reverted Visual edit |
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[[File:ZIP Code zones.svg|thumb|ZIP Code zones in the United States]]
ZIP Codes are numbered with the first digit representing a certain group of U.S. states, the second and third digits together representing a [[region]] in that group (or perhaps a large city) and the fourth and fifth digits representing a group of delivery addresses within that region. The main town in a region (if applicable) often gets the first ZIP Codes for that region; afterward, the numerical order often follows the alphabetical order.<ref>{{
In general, the first three digits designate a [[sectional center facility]], the mail sorting and distribution center for an area. A sectional center facility may have more than one three-digit code assigned to it. For example, the Northern Virginia sectional center facility in [[Merrifield, Virginia|Merrifield]] is assigned codes 220, 221, 222, and 223. In some cases, a sectional center facility may serve an area in an adjacent state, usually due to the lack of a proper ___location for a center in that region. For example, 739 in Oklahoma is assigned to [[Amarillo, Texas]]; 297 in [[South Carolina]] is assigned to [[Charlotte, North Carolina]]; 865 in Arizona is assigned to [[Albuquerque, New Mexico]]; and 961 in [[California]] to [[Reno, Nevada]].
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