The NAICS and SIC codes are the most commonly used industry classification codes in the United States. These codes categorize companies by their business activity.
By knowing the NAICS and/or SIC code for your company, you will be able to locate information about its industry and competitors in databases, books, and on the Internet.
Some resources will provide you only the company's primary industry code while other sources may also give you secondary codes. The primary code represents the line of business for which the company makes the most income.
Standard Industrial Classification (SIC) System
North American Industry Classification System (NAICS)
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The sources below are places to search for your company's NAICS codes.
The sources below are places to search for your company's SIC codes.