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A 1974 postage stamp encouraging people to use the ZIP Code on letters and parcels. A ZIP Code (an acronym for Zone Improvement Plan [1]) is a system of postal codes used by the United States Postal Service (USPS).
English: This map of the United States divides the country into ZIP code zones. All states with a common colour use ZIP codes starting with the same digit. Each string of digits, whether two or three digits in length, refers to an allocation which reflects all existing ZIP codes starting with those two or three digits.
ZCTAs or ZIP Code Tabulation Areas are the census equivalent of ZIP codes used for statistical purposes. The reason why regular ZIP codes are not used is because they are defined by routes rather than geographic boundaries. Thus, they have the tendency to overlap and otherwise create difficulties.
ZIP Code Tabulation Areas (ZCTAs) are statistical entities developed by the United States Census Bureau for tabulating summary statistics. These were introduced with the Census 2000 and continued with the 2010 Census and 5 year American Community Survey [ 1 ] datasets.
Philadelphia has 41 ZIP-codes, which are often used for neighborhood analysis. [ 1 ] Historically, many neighborhoods were defined by incorporated townships (Blockley, Roxborough), districts (Belmont, Kensington, Moyamensing, Richmond) or boroughs (Bridesburg, Frankford, Germantown, Manayunk) before being incorporated into the city with the Act ...
For example, Fresh Meadows postal mail was routed through the main post office in Flushing, and Fresh Meadows' ZIP Codes 11365 and 11366 were both labeled as "Flushing". At the urging of the citizens of Queens and with the support of Congressman Gary Ackerman, ZIP Codes are also named after the main post office they serve. The original ZIP ...