Fort Belvoir is unlike any other Army installation in the world. It has a diverse, modern-day mission of being a strategic sustaining base for America's Armed Forces. A list of organizations at Fort Belvoir reads like a "Who's Who" in the department of Defense. No other Army installation in the world can compare with our diverse, modern-day mission of providing logistical and administrative support to over 120 diverse tenant satellite organizations.

Fort Belvoir is home to several Army command headquarters, units and agencies of nine different Army major commands, 16 different agencies of the Department of the Army, eight elements of the U. S. Army Reserve and Army National Guard and nine DOD agencies. All these agencies play important roles in Fort Belvoir's global mission to provide worldwide logistical and administrative support to all the armed services. 

The area code for Fort Belvoir is 703. The installation's Hotline number is 703-805-3030 and the Information Line is 703-545-6700. DSN prefixes are: 655 for commercial numbers beginning with 805; 656 for commercial numbers beginning with 806; 654 for numbers beginning with 704; and 427 for numbers beginning with 767. The area code for Washington D.C. is 202 and for Maryland (closest to Fort Belvoir) it is 301.

Defense Service Network (DSN) Dialing Instructions

The DSN is the provider of long-distance communications service for the Department of Defense (DoD). Every installation has a special DSN number and the numbers vary by world-wide location. In order to place a call using DSN, the caller must be using a military phone on an installation. Cell phones cannot dial DSN numbers. When dialing a DSN number from a United States installation to another United States installation, it is unnecessary to dial the DSN 312 area code. When dialing a DSN number to/from overseas locations, the DSN area code must be included. The operator can be reached at commercial (719) 567-1110. Please note that long distance charges may be incurred.