20230703 11475600 1.0 TRUE ZCTA3 ZIP code tabulation area (ZCTA) - 3 digit These boundaries were derived from the 2010 ZCTA boundaries published by the US Bureau of the Census. Using the first 3 digits of the 5 digit ZCTA, these polygons were created using the Dissolve geoprocessing task. US Bureau of the Census, Missouri Office of Geospatial Information