Type what your business does, a product or service you sell, or a keyword, and get the matching codes from the official 2022 North American Industry Classification System (NAICS). Each result shows the 6-digit code, its official title, its place in the hierarchy and the corresponding SIC code where one is on record. Free, no sign-up.
How NAICS codes work
NAICS is the industry classification the United States, Canada and Mexico share. Every business activity has a code of two to six digits, and each digit narrows the one before it:
- 31-33 sector: Manufacturing
- 332 subsector: Fabricated Metal Product Manufacturing
- 3327 industry group: Machine Shops; Turned Product; and Screw, Nut, and Bolt Manufacturing
- 33271 NAICS industry: Machine Shops
- 332710 national industry: Machine Shops
The three countries largely share the codes down to five digits; the sixth digit adds each country’s own detail. The U.S. list is maintained by the Census Bureau and revised every five years; this lookup uses the 2022 edition.
How to choose your NAICS code
- Start from your main activity. Your primary code is the activity that brings in the most revenue, not every product you make.
- Search in plain words. Describe the activity (“machining parts to order”, “selling tools online”) rather than the customer or a brand.
- Read up the hierarchy. Check that the sector and subsector above the code describe you too. Making a product and selling it wholesale are different sectors (31-33 against 42).
- Prefer the 6-digit code, and use an “All Other” code only when no named industry fits.
- Check what the form asks for. Some forms want a 2017 code or an SIC code; the SIC column helps you translate.
For a longer walk-through with the codes manufacturers use most, read How to find your NAICS code.
The 20 NAICS sectors
| Code | Sector |
|---|---|
| 11 | Agriculture, Forestry, Fishing and Hunting |
| 21 | Mining, Quarrying, and Oil and Gas Extraction |
| 22 | Utilities |
| 23 | Construction |
| 31-33 | Manufacturing |
| 42 | Wholesale Trade |
| 44-45 | Retail Trade |
| 48-49 | Transportation and Warehousing |
| 51 | Information |
| 52 | Finance and Insurance |
| 53 | Real Estate and Rental and Leasing |
| 54 | Professional, Scientific, and Technical Services |
| 55 | Management of Companies and Enterprises |
| 56 | Administrative and Support and Waste Management and Remediation Services |
| 61 | Educational Services |
| 62 | Health Care and Social Assistance |
| 71 | Arts, Entertainment, and Recreation |
| 72 | Accommodation and Food Services |
| 81 | Other Services (except Public Administration) |
| 92 | Public Administration |
Find the companies behind a NAICS code
Factur’s free U.S. company database uses the same codes: browse the largest companies by industry and state, or read the 2026 U.S. Manufacturing Sales Study on how manufacturing quotes turn into purchase orders. If you would rather have a team find and contact those companies for you, talk to Factur.
Frequently asked questions
How do I find my NAICS code?
Describe what your business does, or name its main product or service, in the lookup above. It searches the official 2022 NAICS titles and ranks the codes whose titles match your words best. Pick the 6-digit code that describes the activity that earns most of your revenue.
What is the difference between a 2-digit and a 6-digit NAICS code?
NAICS is a hierarchy. The first two digits are the sector (31-33 Manufacturing), three digits the subsector (332 Fabricated Metal Product Manufacturing), four the industry group (3327), five the NAICS industry (33271) and six the national industry (332710 Machine Shops). Forms that ask for "your NAICS code" almost always want the 6-digit code.
Can a business have more than one NAICS code?
Yes. A business has one primary NAICS code, for the activity that brings in the largest share of its revenue, and may list secondary codes for its other activities, for example on a government contractor registration. Statistical agencies classify each establishment under its primary activity only.
Who assigns NAICS codes?
No agency assigns you a code or issues a certificate. Businesses choose their own code when they fill in tax, licensing, loan or contracting forms; the Census Bureau and other agencies classify establishments for statistics from the information those forms carry.
What is the difference between NAICS and SIC codes?
SIC (Standard Industrial Classification) is the older 4-digit U.S. system, last revised in 1987. NAICS replaced it in 1997 and is revised every five years; 2022 is the current edition. SIC codes are still used by some lenders, data vendors and the SEC, so the lookup shows the corresponding SIC code where one is on record.
How often does NAICS change?
NAICS is reviewed every five years (2002, 2007, 2012, 2017, 2022). The 2022 revision merged several retail industries into new codes, for example gasoline stations moved from 447 to 457, so check that a code you used years ago still exists.