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NAICS directory

NAICS codes used in federal contracting.

Find the NAICS codes you bid under. Click any code to start a free trial filtered to that NAICS — you can add or change codes anytime in your dashboard.

Information Technology

541511Custom Computer Programming Services541512Computer Systems Design Services— Most-used IT NAICS in federal contracting541513Computer Facilities Management Services541519Other Computer Related Services518210Data Processing, Hosting, and Related Services517311Wired Telecommunications Carriers517312Wireless Telecommunications Carriers (except Satellite)

Professional, Scientific, and Technical Services

541330Engineering Services541611Administrative Management & General Management Consulting541618Other Management Consulting Services541612Human Resources Consulting Services541620Environmental Consulting Services541690Other Scientific and Technical Consulting Services541715Research & Development in the Physical, Engineering, and Life Sciences541810Advertising Agencies541910Marketing Research and Public Opinion Polling541990All Other Professional, Scientific, and Technical Services

Construction

236220Commercial & Institutional Building Construction237310Highway, Street, and Bridge Construction237990Other Heavy and Civil Engineering Construction238210Electrical Contractors and Other Wiring Installation238220Plumbing, Heating, and Air-Conditioning Contractors238310Drywall and Insulation Contractors238910Site Preparation Contractors238990All Other Specialty Trade Contractors

Administrative & Facilities Support

561210Facilities Support Services561612Security Guards and Patrol Services561621Security Systems Services (except Locksmiths)561720Janitorial Services561730Landscaping Services561740Carpet and Upholstery Cleaning Services561311Employment Placement Agencies561320Temporary Help Services

Transportation & Logistics

484110General Freight Trucking, Local484121General Freight Trucking, Long-Distance, Truckload488510Freight Transportation Arrangement493110General Warehousing and Storage

Manufacturing & Equipment

332710Machine Shops332999All Other Miscellaneous Fabricated Metal Product Manufacturing334290Other Communications Equipment Manufacturing334511Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing336411Aircraft Manufacturing

Healthcare & Medical Services

621112Offices of Physicians, Mental Health Specialists621498All Other Outpatient Care Centers621512Diagnostic Imaging Centers621999All Other Miscellaneous Ambulatory Health Care Services

Education & Training

611430Professional and Management Development Training611699All Other Miscellaneous Schools and Instruction611710Educational Support Services

Don’t see your NAICS? Ultraria supports the full NAICS list (1,000+ codes). The codes shown here are simply the most active in federal small-business contracting. Start a free trial and pick yours during setup.

NAICS = North American Industry Classification System. Updated by the U.S. Census Bureau every five years; current codes are NAICS 2022.