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You searched for: Publisher Environmental Systems Research Institute, Inc. (ESRI) Remove constraint Publisher: Environmental Systems Research Institute, Inc. (ESRI) Place Colorado Remove constraint Place: Colorado Year 2001 Remove constraint Year: 2001
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1. Colorado ZIP Code Areas 2002

2001. Geographic Data Technology, Inc. (GDT). Colorado ZIP Code Areas represents five-digit ZIP Code areas used by the U.S. Postal Service to deliver mail more effectively. The first digit of ... Environmental Systems Research Institute, Inc. (ESRI).