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The North American Numbering Plan (NANP) is an integrated telephone numbering plan of 24 countries and territories: the United States and its territories, Canada, Bermuda, and 16 of the Caribbean countries.
The North American Numbering Council is an advisory committee of the Federal Communications Commission (FCC) of the United States, chartered in 1995. [1] Its function is to develop and recommend efficient and fair administrative procedures in the administration of the North American Numbering Plan (NANP), including telephone numbering plan ...
In any case, there were potentially 64 NPAs with a middle digit of 1, given that the first and last digits both had to be in the range of 2 to 9. The number of pulses for a given NPA could range from 5 (for 212) to 19 (for 919). The average number of pulses for these potential NPAs was 12.
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. More information can be found under Numbering Resources.
N. N11 code. North American Numbering Council. List of North American Numbering Plan area codes. North American Numbering Plan expansion. Telephone number pooling. Numbering Resource Utilization/Forecast Report.
There are also 80 area codes reserved for future expansion of the numbering system, that is, those whose middle digit is 9. Article North American Numbering Plan expansion tells how they might be used. This makes a total of 322 currently unused area codes, or 40% of the total space of 800 possible area codes.
