Inactive

The NANPA administers telephony numbering resources for the U.S. and a number of other North American countries pertaining to, among other things, Numbering Plan Areas (also known as area codes) and c... The NANPA administers telephony numbering resources for the U.S. and a number of other North American countries pertaining to, among other things, Numbering Plan Areas (also known as area codes) and central office (CO) codes (digits 4, 5 and 6 of a ten-digit geographic telephone number).