Area code 712

Area code 712 is the telephone area code in the North American Numbering Plan for the most western part of Iowa, including the cities of Spencer, Le Mars, Sioux City, Council Bluffs, Red Oak, Sheldon, Storm Lake, Carroll, Sac City, Logan, and Shenandoah.
Area code 712 was one of the Original NANP [area codes|original three area codes] for the state of Iowa established in 1947. It is the only original area code in Iowa that still has its original boundaries, and one of the few remaining original area codes nationwide that has never been split or overlaid. Despite the proliferation of cell phones and pagers, it is projected to stay that way until at least 2031.