63438 -- U.S. ZIP code Municipality (1990): DURHAM, Missouri All ZIPs for this municipality (1990): 63438 Population (2000): 518 Housing Units (2000): 215 Land area (2000): 14.453610 sq. miles (37.434676 sq. km) Water area (2000): 0.011506 sq. miles (0.029801 sq. km) Total area (2000): 14.465116 sq. miles (37.464477 sq. km) Located within: Missouri (MO) Location: 39.952258 N, 91.699536 W