ZIP code 63544 is officially located in the state of Missouri, primarily serving the city of Green castle. It falls under the administrative jurisdiction of Sullivan County. When planning mail delivery, logistics routing, or demographic research, 63544 operates within the Central Time (CT) timezone and supports the 628 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 63544 ZIP Code Tabulation Area is approximately 25,128. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $88,544.