Area code 319 was assigned to the eastern part, and stretched along the entire border with Wisconsin and Illinois. By the end of the 20th century, the available telephone number pool was depleting rapidly because of the increase in mobile devices, demand for telephone lines for computer equipment, FAX machines, and other services.
Area code 319 was allocated to the eastern region, extending along the entire border with Wisconsin and Illinois. By the turn of the millennium, the telephone number supply dwindled quickly due to the surge in mobile devices, need for phone lines for computers, FAX machines, and other services.