North American Overlay Mapping
Layer Notes - Area Codes
The foreground overlay 'Area Codes' shows the boundaries which represent the telephone area codes for United States and Canada along with the three-digit numbers that represent each area. They are also known as Numbering Plan Areas (NPA), and are maintained by the North American Numbering Plan Association (NANPA).
Area Code borders are not currently available for Mexico. If you know a source for this information, please Contact Me.