Skip to Main Content
* UC Irvine access only

Economics: NAICS / SIC codes

Your comprehensive station for UCI's economic research content and beyond!
URL: https://guides.lib.uci.edu/economics

NAICS / SIC Codes


Find a NAICS or SIC code


By Industry:

Visit the NAICS or SIC websites to search or browse for any code(s). 

 

By Company: 

Use the Mergent Intellect database to find a known company, e.g. General Electric (GE), to see the codes listed on that company's landing page.

 


Learn About NAICS and SIC codes


U.S. Industries (and therefore the companies operating in those industries) are commonly classified according to two codes: 

NAICS = North American Industry Classification System

SIC = Standard Industry Classification

 

Key Points:

  • Codes are important because they act as a standard controlled language for industries.  For example, "green technology" is a vague term that could refer to many industries, whereas NAICS code 221114 refers only to Solar Electric Power Generation.
     
  • NAICS codes are newer and more specific than SIC codes.
     
  • SIC codes are what companies must declare when they first file an S-1 with the SEC to be publicly traded on a US stock exchange.  Companies are not required to declare their NAICS code; it's optional at the discretion of the company. 
     
  • The US Census Bureau is not permitted to release information about individual businesses, including industry classification.  Many research firms ascribe NAICS codes to companies, but accuracy is not guaranteed.  
     
  • No code system is perfect.  Codes might not entirely or accurately describe a company's product(s)/service(s), especially if:
    • 1) a company operates in many lines of business (think of General Electric)
    • 2) a company specializes in a niche product/service in a larger industry

 

return-to-top

Return to the top of the page.

Box title- Access Answers

What can I access? 


Access is generally available to all users. Registration or account creation might be required to access.

For commercial websites, the UCI Libraries do not offer premium memberships or subscriptions.

 


Access is available to all users ON the UCI campus and at GML.

OFF campus access requires Authorized Affiliates to log into the VPN with their active UCInetID and password.
Authorized Affiliates are users with an active UCInetID and password, i.e. current UCI students, faculty, and staff.

 


Access requires an active UCInetID and password.

Authorized Affiliates are users with an active UCInetID and password, i.e. current UCI students, faculty, and staff.

 

The resources are limited to select UCI populations, based on the user’s status, e.g. current UCI Faculty or PhD students. Please refer to the UCI Libraries for access instructions.

Examples for why content may be limited include: a vendor set restrictions on who may access their information; alternatively, information may be sensitive, identifying, or embargoed;

 


How do I access? 
Students
Employees
Alumni
Visitors


New browser window icon.Am I on the UCI network?
Test my UCI connection.


New browser window icon.Am I responsibly
using what I access?

Typically acceptable vs. unacceptable use.