ZIP code 01433 is officially located in the state of Massachusetts, primarily serving the city of Ayer. It falls under the administrative jurisdiction of Middlesex County. When planning mail delivery, logistics routing, or demographic research, 01433 operates within the Eastern Time (ET) timezone and supports the 216 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 01433 ZIP Code Tabulation Area is approximately Data Not Available. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $101,433.