Parent ZIP Codes for Census Database
At the time the U.S. Census Bureau conducts a Census every decade, ZIP Codes without residential addresses (PO Boxes and ZIP Codes in business districts) won't have any demographics assigned to them. This accounts for about 20% of all ZIP Codes. When an individual or business address is a PO Box, you need to know a nearby ZIP Code with a residential population in order to get good demographics. Our Parent ZIP Code provides you with that nearby ZIP Code.
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We are licensees of USPS database products, and license the Parent ZIP Code data from a mapping company and add our own improvements, based on our decades of experience.
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US Census Demographics by ZIP Code
Canadian Divisions / Subdivisions Database