Federal Bureau-investigation 1900 Half St Sw Washington, DC 20024 Phone : (202) 252-7801 Business Category Police Protection Federal Fbi 601 4th St Nw Washington, DC 20001 Phone : (202) 252-7801 Business Category Police Protection Federal United States Government--justice Department Of, Federal Bureau Of Investigation, Maryland Resident Agencies, Washington Metropolitan Field Office 1900 Half St Sw Washington, DC 20001 Phone : (202) 252-7801 Business Category Government Offices & Public Schools