Npa nxx download

Npa nxx

Name: Npa nxx

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The only service-specific overlay in the NANP was area code New York City when it was first installed; such service-specific area code assignments were later prohibited by the Federal Communications Commission. Initially, states that were divided into multiple areas were assigned area codes with a 1 in the middle, the second position, while areas that covered an entire state or province, were numbered with the digit 0 as the middle digit. While this required an expansion of most existing local numbering plans, many of which required only four or five digits to be dialed, or even fewer in small communities, the plan was designed to enable local telephone companies to make as few changes as possible in their systems.