Organization Information Address Management Post Office Changes   Old/New Finance No. ZIP Code State P.O. Name County/Parish Station/Branch/Unit Unit Type Effective Date Comments Old 31-8240 89434 NV Sparks Storey Main Office Post Office     New 31-8240 89437 NV Sparks Storey Main Office Post Office 11/10/2018 Establish a new ZIP Code™ for a delivery area. Use Sparks, NV 89437 as the last line of address for the 123 deliveries previously in ZIP Code 89434. — Address Management, Addressing and Geospatial Technology, 2-14-19