DPO, AE

ZIP code 09820 encompasses Fort Buchanan, a United States Army base located in Guaynabo, Puerto Rico. Established in 1923, the fort serves as a strategic defense installation for the region. It is home to various military units and facilities, including the US Army Reserve Command-Puerto Rico and the 1st Mission Support Command. The area also features amenities such as a commissary, fitness center, and recreational facilities for military personnel and their families.