Using Reference USA to get the industry SIC and NAICS codes
First, under "select a database to search," pull down "U.S. Business." Then, in the search blank QUICK SEARCH / COMPANY NAME, type the name of a company familiar to you that is in your industry. Then click SEARCH NOW. When the list of company names comes up, choose a company name and click to get the company's record. Scroll down the record to find a list of SIC codes and NAICS codes representing the industries in which the company does business.
E X A M P L E :
Reference USA adds extra digits to SIC codes to enhance searching in the Reference USA database. For example, Reference USA gives the industry, Farm Equipment Wholesale, the SIC code of 5083-10; however the actual SIC code is just 5083.