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NAICS classification intelligence

NAICS Guides for Government Contractors

Connect NAICS classifications with registration, opportunity searches and BidReady market research. Always verify the current official definition.

Data source: USAspending.gov FY2024Reviewed: August 2, 2026Educational guidance · verify current requirements with the issuing agency

Connect NAICS classifications with registration, opportunity searches and BidReady market research. Always verify the current official definition.

NAICS 23
Construction Companies
NAICS 2381
Specialty Trade Contractors
NAICS 2382
Specialty Trade Contractors
NAICS 2383
Specialty Trade Contractors
NAICS 2389
Specialty Trade Contractors
NAICS 31
Manufacturers
NAICS 32
Manufacturers
NAICS 33
Manufacturers
NAICS 42
Wholesale Suppliers & Distributors
NAICS 48
Transportation & Trucking Companies
NAICS 49
Transportation & Trucking Companies
NAICS 5324
Equipment Rental Companies
NAICS 5412
Accounting & Financial Firms
NAICS 5413
Engineering Firms
NAICS 5415
IT & Technology Companies
NAICS 5416
Professional & Consulting Firms
NAICS 5417
Research & Development Firms
NAICS 5418
Marketing & Communications Firms
NAICS 5613
Staffing & Employment Agencies
NAICS 5616
Security & Guard Companies
NAICS 5617
Facility & Janitorial Companies
NAICS 561730
Landscaping Companies
NAICS 5621
Environmental & Remediation Companies
NAICS 5622
Environmental & Remediation Companies
NAICS 5629
Environmental & Remediation Companies
NAICS 61
Education & Training Providers
NAICS 62
Medical & Health Services Companies
NAICS 7223
Food Service Companies
NAICS 7225
Food Service Companies

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