ZIP code 05648 is officially located in the state of Vermont, primarily serving the city of Calais. It falls under the administrative jurisdiction of Washington County. When planning mail delivery, logistics routing, or demographic research, 05648 operates within the Eastern Time (ET) timezone and supports the 266 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 05648 ZIP Code Tabulation Area is approximately 18,466. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $56,648.