About phone number allocation in North America

The North American Numbering Plan (NANP) is a telephone numbering plan for the Caribbean and the U.S. territories which encompasses 25 distinct regions in twenty countries primarily in North America. Remember Not all North American countries participate in the NANP. In the 1940s the NANP was originally devised by AT&T for the Bell System and independent telephone operators in North America. The main purpose to doing so to unify the diverse local numbering plans that had been established in the preceding decades. AT&T continued to administer the numbering plan until the breakup of the Bell System when administration was delegated to the North American Numbering Plan Administration (NANPA), a service that has been procured from the private sector by the Federal Communications Commission (FCC) in the United States.

Choose area code to see its locations:

2xx | 3xx | 4xx | 5xx | 6xx | 7xx | 8xx | 9xx

Area Codes by Number