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The North American Numbering Plan is based on a ten-digit telephone number assigned to each telephone in the telephone network. The number is composed of the three-digit numbering plan area code, a three-digit central office code, and a four-digit station or line number. Certain rules govern the numerical format of each part.
The North American Numbering Plan (NANP) is an integrated telephone numbering plan serving 20 North American countries that share its resources.
The North American Numbering Plan (NANP) is an integrated telephone numbering plan serving 20 North American countries that share its resources.
