ZIP code 99640 is officially located in the state of Alaska, primarily serving the city of Nondalton. It falls under the administrative jurisdiction of Lake and Peninsula Borough County. When planning mail delivery, logistics routing, or demographic research, 99640 operates within the Pacific Time (PT) timezone and supports the 881 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 99640 ZIP Code Tabulation Area is approximately 19,081. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $120,640.