ZIP code 70403 is officially located in the state of Louisiana, primarily serving the city of Hammond. It falls under the administrative jurisdiction of Tangipahoa Parish County. When planning mail delivery, logistics routing, or demographic research, 70403 operates within the Central Time (CT) timezone and supports the 855 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 70403 ZIP Code Tabulation Area is approximately 14,855. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $91,403.