How do i contact the department of defense? Contact Information. Office of the Department of Defense. Chief Information Officer. 6000 Defense Pentagon. Washington, D.C. 20301-6000.How do i contact the disa service desk? To contact the DISA service desk, call 1-844-DISA-HLP. Specific contact information, including field offices, program offices, and service desk automated menu sequences can be found in the DISA Help Guide. For more information about working with DISA, please visit the Industry Partners website.How do i contact the department of education by phone? For general inquiries, and questions about the Department (ED) or education policy 1-800-USA-LEARN (1-800-872-5327) Speakers available in Spanish and more than 170 languages. Mailing address: Ask a Question: www.ed.gov/answersWhat is the dsn number for fort meade? Fort Meade DSN is 312-622-xxxx. Post operator can be reached at 301-677-6261. National Security Agency numbers are 301-688-xxxx. The Post Locator can be reached at 301-677-4547. The base operator’s phone number is 301-677-6261 or DSN 312-622-6261.