# NAICS code lookup NAICS codes are the six-digit North American Industry Classification System codes federal buyers use to classify every contract and to set the small business size standard. The 2022 edition has 2,125 codes, 1,012 of them six-digit industries. Search by keyword or by any leading digits. Yes. A SAM.gov registration lists any number of NAICS codes and flags one as primary.Data as of 2026-11-12, from the NAICS 2022 (Census) and 13 CFR 121.201.Official source: [U.S. Census Bureau NAICS](https://www.census.gov/naics/) ## Key facts | Edition | NAICS 2022 | | --- | --- | | Codes | 2,125 (20 sectors to 1,012 national industries) | | Levels | 2-digit sector to 6-digit national industry | | Size standards | 13 CFR 121.201, receipts or employees per 6-digit code | ## Get this as JSON ``` curl "https://samgovapi.io/api/v1/naics/541512" \ -H "Authorization: Bearer sg_YOUR_KEY" ``` MCP tool: `naics_lookup`Keys start free, with no card. [Get a free API key](https://samgovapi.io/sign-up) or read the [docs](https://samgovapi.io/docs). ## Questions How do I find my NAICS code?Search for the work you do, such as 'janitorial' or 'software'. Pick the 6-digit code whose title and examples match your main activity; that is your primary NAICS in SAM.gov.Can a business have more than one NAICS code?Yes. A SAM.gov registration lists any number of NAICS codes and flags one as primary. Small business status is set per code.Where do size standards come from?From the SBA table in 13 CFR 121.201. Each 6-digit code has a cap on average annual receipts or on employees. ## Related - [All NAICS codes](https://samgovapi.io/naics) - [NAICS code by company name](https://samgovapi.io/naics-code-lookup-by-company-name) - [Size standard checker](https://samgovapi.io/size-standard-checker) - [NAICS code for an industry](https://samgovapi.io/naics-code-for) - [NAICS API](https://samgovapi.io/naics-api)Independent. Not affiliated with, endorsed by or sponsored by GSA, SAM.gov or any U.S. government agency. Registering in SAM.gov is free at sam.gov.

---

HTML version: https://samgovapi.io/naics-code-lookup . Markdown: https://samgovapi.io/naics-code-lookup.md

Independent. Not affiliated with, endorsed by or sponsored by GSA, SAM.gov or any U.S. government agency. Registering in SAM.gov is free at sam.gov.

Get a free API key: https://samgovapi.io/sign-up?ref=ai-claudebot