Robert Moon (postal inspector)

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Robert Aurand Moon (April 15, 1917, Williamsport, Pennsylvania, USA – April 11, 2001, Leesburg, Florida, USA), sometimes called "Mr. ZIP", is considered the father of the ZIP Code or Zone Improvement Plan, a mechanism to route mail in the United States.[1] He developed the idea in 1944 while working as a postal inspector in Philadelphia, although his system used only the first three digits of what would eventually become a five-digit and later a nine-digit system; the first Directory of Post Offices using five-digit ZIP code numbers was published in 1963.


  1. ^ Martin, Douglas (2001-04-14). "Robert Moon, an Inventor of the ZIP Code, Dies at 83". New York Times. Retrieved 2017-09-23.