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. In order to place a call using DSN, the caller must be using a military phone on an installation. Every installation has a special DSN number and the numbers vary by world-wide location. The DSN is the provider of long-distance communications service for the Department of Defense (DoD). Show moreĭefense Service Network (DSN) Dialing Instructions Several contracting organizations support the tenant organizations. Army Engineering and Support Center, Program Executive Office Missiles and Space, Program Executive Office Aviation, NASA's Marshall Space Flight Center, Terrorist Explosive Devices Analytical Center, ATF- National Center for Explosives Training and Research, FBI Hazardous Devices School and Federal Bureau of Investigation. Army Audit Agency, Fox Army Health Center, U.S. Army Space and Missile Defense Command (SMDC), 2nd Recruiting Command, Redstone Test Center (RTC), U.S.

Missile Defense Agency (MDA), Defense Intelligence Agency/Missile and Space Intelligence Center, U.S. Army Security Assistance Command, Army Contracting Command (ACC), Army Combat Capabilities Development Command Aviation & Missile Center, Logistic Data Analysis Center U.S. Tenant organizations include: Headquarters, Army Materiel Command (AMC), Army Aviation and Missile Command (AMCOM), U.S. It oversees the entire Arsenal, providing quality, cost effective base operations support to its customers, tenants, and DoD and federal activities in the vicinity of the installation. The USAG Redstone Arsenal supports all organizations on the Arsenal.

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