Missouri Information Centers Hannibal On the east side of Hwy. 61, two miles south of Hwy. 36 junction P.O. Box 575 Hannibal, MO 63401 573-248-2420 Jefferson City Truman State Office Building, 301 W. High St. P.O. Box 1055 Jefferson City, MO 65102-1055 573-751-4133 Joplin Rest area on I-44 near Joplin, approx. two miles east of the MO-OK state line P.O. Box 2275 Joplin, MO 64803 417-629-3030 Kansas City 4010 Blue Ridge Cutoff Kansas City, MO 64133 816-899-3330 New Madrid (Marston rest area on northbound lane of I-55 P.O. Box 246 New Madrid, MO 63869 573-643-2654 Rock Port Rest area on west side of I-29, 1/2 mile south of Hwy. 136 junction P.O. Box 69 Rock Port, MO 64482 660-744-6300 St. Louis I-270 at Riverview Dr., just west of the Missouri-Illinois state line P.O. Box 38182 St. Louis, MO 63138 314-869-7100