ZIP code 01845 is officially located in the state of Massachusetts, primarily serving the city of North andover. It falls under the administrative jurisdiction of Essex County. When planning mail delivery, logistics routing, or demographic research, 01845 operates within the Eastern Time (ET) timezone and supports the 306 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 01845 ZIP Code Tabulation Area is approximately 43,706. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $105,845.