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 worldwide 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.
Telephone Access for NSA Bethesda
DSN 312-295-XXXX if commercial number is 301-295-XXXX
DSN 312-285-XXXX if commercial number is 301-319-XXXX
DSN 312-469-XXXX if commercial number is 301-400-XXXX
Information Desk is located in Tranquility Hall, Bldg. 62 and can be reached by dialing 301-400-0200. Walter Reed National Military Medical Center Information Desk can be reached by dialing 301-295-4000.
For a medical emergency please dial 9-1-1.
For after hours, evenings, and weekend emergency assistance, contact the American Red Cross at 877-272-7337.