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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.

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Code Systems
Code Systems

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

Industry Codes
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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
Industry Intelligence Center
Industry Intelligence Center

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

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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 SIC and NAICS classifications.

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ISIC (International) SOC (Occupations)

Companies for "air-duct-cleaning"

  • Affordable Aire Duct Cleaning
    Bowie, MD, 20716 Country: US US
    238220 - Plumbing, Heating, and Air-Conditioning Contractors
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  • Quality Aire Duct Cleaning
    Manitowoc, WI, 54220 Country: US US
    238220 - Plumbing, Heating, and Air-Conditioning Contractors
    More Companies in this Industry
  • Custom Aire HVAC + Duct Cleaning
    Bensalem, PA, 19020 Country: US US
    238220 - Plumbing, Heating, and Air-Conditioning Contractors
    More Companies in this Industry

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

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

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

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Governed industry classification reference.

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