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You searched for: Format Shapefile Remove constraint Format: Shapefile Publisher Environmental Systems Research Institute, Inc. (ESRI) Remove constraint Publisher: Environmental Systems Research Institute, Inc. (ESRI) Data type Polygon Remove constraint Data type: Polygon Year 2000 Remove constraint Year: 2000
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21. U.S. Telephone Area Code Boundaries 2000

2000. Geographic Data Technology, Inc. (GDT). U.S. Telephone Area Code Boundaries represents the telephone area codes for United States. They are also known as Numbering Plan Areas (NPA). Environmental Systems Research Institute, Inc. (ESRI).