Digital Maps and Geospatial Data | Princeton University
U.S. Telephone Area Code Boundaries 2000
- Geographic Data Technology, Inc. (GDT)
- Environmental Systems Research Institute, Inc. (ESRI)
- U.S. Telephone Area Code Boundaries represents the telephone area codes for United States. They are also known as Numbering Plan Areas (NPA).
- United States
- 2000 and 2000
- Held by:
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