Zip Codes Topics


postman1 on January 20th, 2010

How Many Zip Codes are in the United States? The number of zip codes in the United States periodically changes as the U.S. Post Office finds it necessary to add new codes in response to increasing mail volume. According to the U.S.Census Bureau and other sources, there are at least 40,000 five-digit zip code areas in the U.S. In a period of [...]

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