In 1947, AT&T completed a new design for a nationwide toll network that established the original North American area codes. The new organization provided for 152 area codes, each with a capacity to serve up to 540 central offices. Originally, only eighty-six area codes were assigned. New Jersey received the first NPA code in the new system, area code 201. The second area code, 202, was assigned to the District of Columbia. The allocation of area codes was readjusted as early as 1948 to account for inadequacies in some metropolitan areas. For example, the Indiana numbering plan area 317 was divided to provide a larger numbering pool in the Indiana suburbs of Chicago (area code 219).