Exchange (Marine Corps Main Exchange Building) MCX Building 1502 MCAGCC Twentynine Palms, CA 92278 Phone 760-830-6163 Phone (DSN) 312-230-6163 Mon - Fri 6:00 a.m. - 9:00 p.m. Sat – Sun 8:00 a.m. - 9:00 p.m. Call for Holiday Special Hours Website | Map
