After the CNMI was added to the North American Numbering Plan, the U.S. Federal Communications Commission (FCC) regulated calls to and from the CNMI as "domestic", hence dramatically lowering the cost of these telephone calls.
Following the CNMI's inclusion in the North American Numbering Plan, the U.S. Federal Communications Commission (FCC) managed calls to and from the CNMI as "domestic", thus significantly reducing the cost of these telephone calls.