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1. United States Telephone Area Code Boundaries, 2014

2014. Environmental Systems Research Institute (Redlands, Calif.) and TomTom North America, Inc. This polygon shapefile contains the boundaries of telephone area codes in the United States. They are also known as Numbering Plan Areas (NPA). The... Environmental Systems Research Institute (Redlands, Calif.).

2. U.S. ZIP Code Areas (Three-Digit)

2014. Environmental Systems Research Institute (Redlands, Calif.) and TomTom North America, Inc. This polygon shapefile represents boundaries with the first three digits of a ZIP Code. The first digit of a five-digit ZIP Code divides the United... Environmental Systems Research Institute (Redlands, Calif.).