NANP
The integrated telephone numbering plan covering the United States and its territories, Canada, and much of the Caribbean. Established in 1947, it uses ten-digit numbers in the form NPA-NXX-XXXX under country code +1.
The integrated telephone numbering plan covering the United States and its territories, Canada, and much of the Caribbean. Established in 1947, it uses ten-digit numbers in the form NPA-NXX-XXXX under country code +1.