Menu Close
NAICS
NAICS Codes

Official North American industry classification system for business reporting and analysis.

NAICS Code Lookup / Directory NAICS Classification & Reference Center
SIC
SIC Codes

Established U.S. industry classification system widely used across business, reporting, analytics, and cross-dataset comparability.

SIC Code Lookup / Directory SIC Classification & Reference Center
Code Systems
Code Systems

Standard classification systems used to organize industries, products, occupations, and business identifiers across U.S. and global datasets

Industry Codes
SIC 6-Digit NAICS 8-Digit ISIC (International) NACE UKSIC ANZSIC SCIAN Français SCIAN Español
Occupational & Educational Codes
SOC Extended SOC CIP
Product Codes
NAPCS CPA HS CPC CN
Specialized Business Codes
CAGE DUNS GICS EBOPS
Classification Research Tools Center What Is a Classification System
Classification Conversion Tools
Classification Conversion Tools

Convert industry codes between classification systems

U.S Industry Codes SIC → NAICS NAICS → SIC
International Industry Codes ISIC → NAICS NAICS → ISIC
Occupational and Educational Codes CIP → SOC SOC → CIP
Industry Intelligence Center
Industry Intelligence Center

Industry research, structure, and applied insights built on governed NAICS & SIC classification standards.

Overview Industry Classification Hubs Trending Industries Applied Use Cases & Business Intelligence SIC vs NAICS (Comparisons & Context)
Governance
Governance

Governance at SICCODE.com defines how industry classification data is maintained, reviewed, and validated over time. It documents the standards, verification frameworks, and editorial controls used to ensure consistent and neutral application of NAICS and SIC classifications.

Authority & Trust Hub Classification Governance & Standards Center Our Classification Methodology Industry Classification Verification Framework Data Accuracy & Standards Alignment Editorial Neutrality Standards Industry Classification Review Team
Register My Business Login
My Profile
Das​h​board Prev​iew Busi​ness Det​ails Indu​stry Co​des S​IC & NAI​CS Ba​dge
Lo​go​ut
Products & Services
Business Lists USA Business Lists Business Lists by NAICS Business Lists by SIC New Businesses List USA Business Mailing Lists Canada Business Lists
Email Lists Email Lists by NAICS & SIC Executive Email Lists
Data Appending & Enrichment Clean & Enrich Your Company File Classification Appending NAICS Code Appending SIC Code Appending
Targeting & Classification Find Companies Like Your Customers Find Your NAICS & SIC Codes
Large Datasets U.S. Business Database Data for AI & Analytics U.S. Business Location Data Classification Data Licensing Canada Business Database
Pricing & Custom Quotes See standard pricing or tell us what data you need. See All Available Data Fields →
View Pricing & Get a Quote
Company
About SICCODE.com About SICCODE.com Why SICCODE.com Our Story & Mission How It Works Contact Us Blog
Data & Recognition About Our Business Data Business Data Dictionary Citations & Academic Recognition
Buy Business List
 
What Is a NAICS 8-Digit Code?
All NAICS SIC Companies
SIC 6-Digit NAICS 8-Digit ISIC (International) NACE (Europe) SOC (Occupations) CIP (Programs) Extended SOC (O*NET)

NAICS 8-Digit Codes for "naics:33151"

Extended NAICS codes provide more specific industry categories within official 6-digit NAICS classifications, supporting more precise industry segmentation, market research, and business targeting. For official NAICS classification, use the 6-digit NAICS code.

Search this keyword in SIC 6-Digit codes.

companies

Verified U.S. companies available for purchase in this industry. Counts are based on primary business classifications.

Industry NAICS 8-Digit U.S. companies Add

Castings-Iron (Manufacturing)

Parent: Iron Foundries

 Extended NAICS 331511-01 companies 10companies

Foundries-Ductile Iron (Manufacturing)

Parent: Iron Foundries

 Extended NAICS 331511-02 companies —

Foundries-Gray Iron (Manufacturing)

Parent: Iron Foundries

 Extended NAICS 331511-03 companies 3companies

Foundries-Iron (Manufacturing)

Parent: Iron Foundries

 Extended NAICS 331511-04 companies 20companies

Foundries-Malleable Iron (Manufacturing)

Parent: Iron Foundries

 Extended NAICS 331511-05 companies 4companies

Gray & Ductile Iron Foundries (Manufacturing)

Parent: Iron Foundries

 Extended NAICS 331511-06 companies 12companies

Manhole Covers (Manufacturing)

Parent: Iron Foundries

 Extended NAICS 331511-07 companies 11companies

Sash Balances & Weights (Manufacturing)

Parent: Iron Foundries

 Extended NAICS 331511-08 companies 1companies

Foundries-Nickel & Alloys (Manufacturing)

Parent: Iron Foundries

 Extended NAICS 331511-09 companies 9companies

Sewer Pipe (Retail) (Manufacturing)

Parent: Iron Foundries

 Extended NAICS 331511-10 companies 10companies

Cooking Utensils (Manufacturing)

Parent: Iron Foundries

 Extended NAICS 331511-11 companies 4companies

Castings (Manufacturing)

Parent: Iron Foundries

 Extended NAICS 331511-12 companies 260companies

Investment Castings (Manufacturing)

Parent: Steel Investment Foundries

 Extended NAICS 331512-01 companies 60companies

Castings-Ferrous Metals (Manufacturing)

Parent: Steel Foundries (except Investment)

 Extended NAICS 331513-02 companies 14companies

Castings-Steel (Manufacturing)

Parent: Steel Foundries (except Investment)

 Extended NAICS 331513-03 companies 13companies

Foundries-Steel (Manufacturing)

Parent: Steel Foundries (except Investment)

 Extended NAICS 331513-04 companies 313companies

Metal Cutting Coolant Systems (Manufacturing)

Parent: Steel Foundries (except Investment)

 Extended NAICS 331513-06 companies 2companies

Steel Mill Services (Manufacturing)

Parent: Steel Foundries (except Investment)

 Extended NAICS 331513-07 companies 21companies

Steel-Tool (Manufacturing)

Parent: Steel Foundries (except Investment)

 Extended NAICS 331513-08 companies 12companies

Foundries Various Metals (Manufacturing)

Parent: Steel Foundries (except Investment)

 Extended NAICS 331513-09 companies —

Other classifications

Search "naics:33151" in SIC 6-Digit codes →

Sources & methodology

NAICS definitions: U.S. Census Bureau, 2022

SIC definitions: OSHA SIC Manual

Classification methodology →

SICCODE.com business data

15M+ companies · 20M+ establishments

About our business data →

Need help finding the right data?

Tell us who you want to reach. Our company and contact data supports outreach, CRM enrichment, and AI-assisted prospecting.

Free assistance · Fast replies during business hours

Put this data to work

Need companies or contacts?

Email, phone and direct mail lists · Request a free count & sample →

Find companies like your best customers

Lookalike targeting · Share examples →

Customer file missing industry codes?

NAICS and SIC appending · Get codes added →

Code too broad? Refine your targets by company fit.

Website-Reviewed & Enriched Lists · See how it works →

Standard business-list orders start at $50, with flexibility for smaller industry lists.

See what's included in a business list

Standard business list fields

Company & contacts

Company name, contact name and title, phone, website

Address & location

Business and mailing address, location type, latitude/longitude

Industry & firmographics

NAICS and SIC codes and titles, sales, employees, years in business, modeled credit

Field availability varies by company.

Optional business contact emails

Available for eligible U.S. lists, priced separately. Not included in Canadian lists.

Additional data on request

More business attributes, geographic details, digital information, and website research.

View full Business Data Dictionary →

See all products and pricing

Classification & Data Governance

Industry Intelligence

Industry research, structure, governance alignment, and applied industry classification insights, across marketing, compliance, analytics, and enterprise decision-making.

Governance & Methodology Data Accuracy & Benchmarks

Industry Classification Hubs

Sector-level NAICS & SIC classification hubs defining scope, boundaries, examples, and cross-industry distinctions.

Classification Research Tools

Code lookups, conversions, and research utilities for NAICS, SIC, ISIC, and related classification systems.

NAICS Lookup / Directory SIC Lookup / Directory

Applied Data Services & Use Cases

How classification-first data supports business lists, enrichment, analytics, and compliance workflows.

Business & Company Lists Data Appending & Enrichment

Authority & Trust Hub

Governed industry classification reference.

Expert-guided methodology · Documented updates & revision history · 2026 Edition

SICCODE.com provides free public access to core NAICS, SIC, and SOC reference data. Paid services support verified, documented, and enterprise-scale classification needs.

NAICS & SIC Code Business Registration | About Us | Contact Us | Privacy Policy | Terms & Conditions

Industry Classification Reference

Trusted since 1998