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Hierarchy of numbers

white and brown city buildings during daytime
Source

A NAICS code can have up to 6 digits. The breakdown:

  • The 1st and 2nd numbers = economic sector
  • The 3rd number = sub-sector
  • The 4th number = industry group
  • The 5th number = industry
  • The 6th number = national industry (a zero indicates no national industry is needed)

naics hierarchy of numbers

In Canada, there are:

  • 20 sectors
  • 99 sub-sectors
  • 323 industry groups
  • 695 industries
  • 922 Canadian industries

table that lists the 20 sectors with code

Source: NAICS 2022