Iatan, Missouri Road sign announcing Iatan’s location on Northbound Missouri Highway 45.(below) Northbound at Iatan. Southbound at Iatan. 1830 1834 1836 1839 1840 1846 1850 1851 1852 1853 1854 1858 1859 1859 1860 1861 1862 1865 1867 1868 1870 More Info