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Location: NFATC / Foreign Service Institute
4000 Arlington Blvd., Arlington, Virginia
Tel: 703-302-6990; Fax: 703-302-6799
Mailing address: ADST, PO Box 41839, Arlington, VA 22204
ADST is located at the National Foreign Affairs Training Center (NFATC), located at the junction of Arlington Boulevard (Route 50) and South George Mason Drive in Arlington, Virginia. Traveling west on Route 50 from Washington, DC, exit on the right at George Mason Drive, turning left at the traffic light. Turn left again at the Arlington Boulevard service road, and enter the facility at the NFATC entrance on the right. The main entrance to the NFATC on South George Mason Drive remains closed to vehicular traffic owing to security measures. Visitors who do not have a Department of State ID must check in at the Visitor’s Center. ADST is located in Building I, on the Arlington Boulevard side of campus.