SIC Lookup Help

*Tips for Utilizing the SIC Keyword Search Tool*

Determining the Appropriate Code for Your Business:


NAICS lookup help - where do I start?
How do I get an SIC Code? Has one been assigned to me?

SIC is a Self-Assigned System. Essentially what that means is you pick the code that best suits your business and use it when asked for your code. No one assigns you an SIC Code! ALSO - for most official governmental purposes, SIC Codes have been discontinued and replaced by the NAICS coding system. However, the SIC Code system is still valuable as a marketing tool. 

How do I look up a Company's SIC Code?

To identify the SIC Code being used for a specific company, visit the US Company Lookup Tool by To identify the proper code for your company, use the SEARCH TOOLS to identify the code that best reflects your primary business activity (revenue producing activity.)

Does My Business have an SIC Code?

Yes and no. As long as you have a business you must have a business activity. Your SIC Code may reflect your primary revenue stream or the manufacturing process used most in your business. However, legally, the SIC system has been discontinued as a required field by most organization so unless someone specifically requests it, you should have no official need for an SIC code. 

Can I use more than one code?

Yes. Many businesses have more than one revenue-producing line of business.

Do we have to Register with NAICS Association?

No! We are just here to help you determine the best code for your business using our online tools, as well as to provide effective Targeted Marketing Lists and mission-critical Data-Appends to your Customer Databases. 

How Do I use the Online Tools?

The Keyword Search allows you to put in a single keyword such as “Restaurant” or “Plumbing”, “Computers” or “Consulting”, and returns all codes that contain that word in the title or in the description. Look through the results and you should find the answer. Whether you are a wholesaler of plumbing parts or are an actual plumbing company a keyword search on the term “Plumbing” will get you to the appropriate code.

The Division Drill-Down table allows you to hone in on Wider Industry Categories such as “Construction” or “Manufacturing” to find all of the full six digit codes that fall within that Industry. Identify the code that appears closest to your line of business and you are finished.

What if I still can’t find my code? 

The NAICS to SIC Crosswalk can be used to identify your SIC code if you first Identify your NAICS code. If you cannot determine your NAICS Code using the tips in NAICS Lookup Help, Contact the Census Bureau! They are the official US Government Authority who manages the NAICS Coding System. Go to and at the top highlight “Business” and click on “NAICS”. They have a section called “Ask Dr. NAICS” at that location. You can Call or E-mail them with your questions. *Please don’t Call or E-mail NAICS Association requesting help with a code! We receive hundreds of calls daily and simply cannot make the code determination for you. The Census Bureau is the authority in these matters!

How do I find my SIC Code, or, I have my SIC Code, how do I find my NAICS Code?

We offer Cross-References – both SIC to NAICS and NAICS to SIC, on the NAICS and SIC Crosswalk Page which enables you to cross over from one coding system to the other. If you can find one code you can obtain the other. TIP: If you are an existing business use our new US Company Lookup Tool to Download your Company’s D&B Marketing Record. It contains the both the NAICS code and SIC Code that D&B has listed for your Company.