Primary NAICS codes:

237130 - Power and Communication Line and Related Structures Construction
238110 - Poured Concrete Foundation and Structure Contractors
238120 - Structural Steel and Precast Concrete Contractors
238210 - Electrical Contractors and Other Wiring Installation Contractors
238290 - Other Building Equipment Contractors
334220 - Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing
334511 - Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
493110 - General Warehousing and Storage
517311 - Wired Telecommunications Carriers
517312 - Wireless Telecommunications Carriers (except Satellite)
517410 - Satellite Telecommunications
517919 - All Other Telecommunications
518210 - Data Processing, Hosting, and Related Services
541310 - Architectural Services
541330 - Engineering Services
541340 - Drafting Services
541511 - Custom Computer Programming Services
541512 - Computer Systems Design Services
541513 - Computer Facilities Management Services
541519 - Other Computer Related Services
541611 - Administrative Management and General Management Consulting Services
541613 - Marketing Consulting Services
541614 - Process, Physical Distribution, and Logistics Consulting Services
541715 - Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
541990 - All Other Professional, Scientific, and Technical Services
561210 - Facilities Support Services
561621 - Security Systems Services (except Locksmiths)
611519 - Other Technical and Trade Schools
811213 - Communication Equipment Repair and Maintenance