ZIP code 99001 is officially located in the state of Washington, primarily serving the city of Airway heights. It falls under the administrative jurisdiction of Spokane County. When planning mail delivery, logistics routing, or demographic research, 99001 operates within the Pacific Time (PT) timezone and supports the 407 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 99001 ZIP Code Tabulation Area is approximately 37,507. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $57,001.