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 03-2849 86015 AZ Flagstaff Coconino Bellemont Place Name   This announcement expands the use of ZIP Code™ 86015 to include delivery. New 03-2849 86015 AZ Flagstaff Coconino Bellemont Place Name 01/05/2019 Old 23-8478 20905 MD Silver Spring Montgomery Main Office Post Office   Realign ZIP Code boundaries. Use Ashton, MD 20861 as the last line of address for the 348 deliveries previously in ZIP Code 20905. New 23-0306 20861 MD Ashton Montgomery Main Office Post Office 01/05/2019 — Address Management, Addressing and Geospatial Technology, 1-31-19