ZIP code 01033 is officially located in the state of Massachusetts, primarily serving the city of Granby. It falls under the administrative jurisdiction of Hampshire County. When planning mail delivery, logistics routing, or demographic research, 01033 operates within the Eastern Time (ET) timezone and supports the 321 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 01033 ZIP Code Tabulation Area is approximately 26,921. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $101,033.