NANP (North American Numbering Plan)

From NENA Knowledge Base

NANP (North American Numbering Plan) is an integrated telephone numbering plan serving 20 North American countries that share its resources and are in the +1 country code. NANP numbers are ten-digit numbers consisting of a three-digit Numbering Plan Area (NPA) code, commonly called an area code, followed by a seven-digit local number. The format is usually represented as NXX-NXX-XXXX where N is any digit from 2 through 9 and X is any digit from 0 through 9.

External References

NANPA website