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Census Bureau

New Code System in NAICS

NAICS industries are identified by a 6-digit code, in contrast to the 4-digit SIC code. The longer code accommodates the larger number of sectors and allows more flexibility in designating subsectors. It also provides for additional detail not necessarily appropriate for all three NAICS countries. The international NAICS agreement fixes only the first five digits of the code. The sixth digit, where used, identifies subdivisions of NAICS industries that accommodate user needs in individual countries. Thus, 6-digit U.S. codes may differ from counterparts in Canada or Mexico, but at the 5-digit level they are standardized.

Examples of NAICS Hierarchy

NAICS level Example #1 Example #2
NAICS code Description NAICS code Description
Sector 31-33 Manufacturing 51 Information
Subsector 334 Computer and electronic product manufacturing 513 Broadcasting and telecommunications
Industry group 3346 Manufacturing and reproduction of magnetic and optical media 5133 Telecommunications
Industry 33461 Manufacturing and reproduction of magnetic and optical media 51332 Wireless telecommunications carriers, except satellite
U.S. Industry 334611 Reproduction of software 513321 Paging


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U.S. Census Bureau, last updated  3/6/98