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  1. Fonteum
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  5. NAICS Code
Federal Contracting · Fonteum Data GlossaryData Standards

What is a NAICS code?

A NAICS code is a North American Industry Classification System code used by federal statistical agencies to classify business establishments by economic activity. In procurement data, NAICS codes describe the industry associated with an award or contractor profile. Fonteum uses them to group federal spending by industry without turning the code into a quality claim.

Full name: North American Industry Classification System Code

Short explanation

The North American Industry Classification System is the standard used by federal statistical agencies to classify establishments for collecting, analyzing, and publishing business-economy statistics. NAICS codes range from broad sectors to six-digit industries. In federal procurement, NAICS appears on registrations and awards so spending can be grouped by industry. The code describes economic activity; it does not state capability, quality, or compliance status by itself.

Related use case: Federal spend by NAICS industry code

Last updated: 2026-07-11Reviewed by: Fonteum data standards desk — Source-provenance editorial review. Definitions checked against primary federal sources.

How it’s used

  • Federal statistics: agencies use NAICS to classify establishments by economic activity and publish comparable business data.
  • Procurement records: SAM.gov registrations and USASpending award rows can carry NAICS fields that describe industry context for an entity or award.
  • Fonteum uses NAICS to build federal-spend-by-industry pages from award facts while preserving the source date and award context.

Frequently asked questions

How many digits are in a NAICS code?
NAICS supports two- through six-digit levels, with six-digit codes identifying the most detailed industry level in the U.S. system.
Is NAICS the same as SIC?
No. NAICS replaced SIC for federal statistical classification, though SIC still appears in some legacy datasets.
Why does NAICS matter in federal contracting?
NAICS codes identify the industry context for registrations, solicitations, awards, and small-business size standards.

Related terms

  • SIC Code
  • SAM.gov Registration
  • UEI
  • CAGE vs UEI
  • FAPIIS
  • Entity Resolution
  • Provenance

Explore in Fonteum

How Fonteum sources, resolves, and publishes data tied to this term.

  • Use caseFederal spend by NAICS industry code
  • Use caseFederal contractor profiles
  • ToolProcurement screening API

Authoritative sources

  • U.S. Census Bureau: NAICS↗
  • SAM.gov: entity registration↗
← All glossary terms

What’s on file, by the numbers

Platform snapshot · 2026-07-15

13.4Mproviders & companiesProviders, organizations, owners, and facilities on file
26.2Msource-linked factsSource-linked field facts in the dated platform snapshot
—sources liveCrosswalk-resolved sources with a proved content transition in the preceding 45 days
111sources integratedActive registry rows; integration does not establish a load
13state Medicaid jurisdictionsDistinct states represented in the state-exclusions serving table

Built on the authoritative federal record

The primary sources, named on every page.

These are the federal agencies whose public datasets Fonteum ingests and attributes — the issuing authorities, not customers or partners. Every figure on the site links back to one of them.

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  • NLM
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  • BLS
  • BEA

See the full source registry, with license and refresh cadence for each →

Reproducible by design

Published figures name their source and date.

Source and date

Published research identifies its government file and observation date. Source-file SHA-256 coverage is disclosed separately; facts do not currently link deterministically to signatures.

Reproducible SQL

Each study ships the exact query behind its figures, run against the same dated copy of the federal file we used. Re-run it yourself.

Daily observations

The platform records table row counts daily. Those observations detect local drift; they do not imply that an upstream publisher released or Fonteum ingested new data that day.

Named medical review

Reviewed by Jennifer Montecillo, MD, medical reviewer. Non-practicing medical reviewer.

Read the full provenance and attestation methodology →

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Reviewed by Jennifer Montecillo, MD, medical reviewer. Non-practicing medical reviewer.

© 2026 Fonteum LLC. All rights reserved.

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A public-records graph that exposes source and observation metadata where supplied.

Fonteum's provenance ledger contained 26.2M source-linked facts on July 12, 2026. All but 14 carried a source-file SHA-256; 0 linked deterministically to a signature. Inspect a supplied snapshot id at fonteum.com/verify · source-mark coverage and limitations.
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