SIC 4939 — Combination Utilities, NEC
Description & Classification
SIC code 4939 representing 'Combination Utilities, NEC' is an industry category in the Standard Industrial Classification (SIC) system under U.S. OSHA and Federal procurement registers.
Modern NAICS Crosswalk
Trace the modern equivalent classifications in the 2022 North American Industry Classification System (NAICS) database:
- NAICS 221210 - Natural Gas Distribution (via SIC1987:4939→NAICS1997:22121→2002:221210→2007:221210→2012:221210→2017:221210→2022:221210)
- NAICS 221112 - Fossil Fuel Electric Power Generation (via SIC1987:4939→NAICS1997:221112→2002:221112→2007:221112→2012:221112→2017:221112→2022:221112)
- NAICS 221113 - Nuclear Electric Power Generation (via SIC1987:4939→NAICS1997:221113→2002:221113→2007:221113→2012:221113→2017:221113→2022:221113)
- NAICS 221111 - Hydroelectric Power Generation (via SIC1987:4939→NAICS1997:221111→2002:221111→2007:221111→2012:221111→2017:221111→2022:221111)
- NAICS 221117 - Biomass Electric Power Generation (via SIC1987:4939→NAICS1997:221119→2002:221119→2007:221119→2012:221117→2017:221117→2022:221117)
- NAICS 221118 - Other Electric Power Generation (via SIC1987:4939→NAICS1997:221119→2002:221119→2007:221119→2012:221118→2017:221118→2022:221118)
- NAICS 221116 - Geothermal Electric Power Generation (via SIC1987:4939→NAICS1997:221119→2002:221119→2007:221119→2012:221116→2017:221116→2022:221116)
- NAICS 221114 - Solar Electric Power Generation (via SIC1987:4939→NAICS1997:221119→2002:221119→2007:221119→2012:221114→2017:221114→2022:221114)
- NAICS 221115 - Wind Electric Power Generation (via SIC1987:4939→NAICS1997:221119→2002:221119→2007:221119→2012:221115→2017:221115→2022:221115)
- NAICS 221122 - Electric Power Distribution (via SIC1987:4939→NAICS1997:221122→2002:221122→2007:221122→2012:221122→2017:221122→2022:221122)
- NAICS 221121 - Electric Bulk Power Transmission and Control (via SIC1987:4939→NAICS1997:221121→2002:221121→2007:221121→2012:221121→2017:221121→2022:221121)
Classification Details
| SIC Code | 4939 |
|---|---|
| Industry Title | Combination Utilities, NEC |
| Division | Division E: Transportation, Communications, Electric, Gas, and Sanitary Services |
| Major Group | Major Group 49: Electric, Gas, and Sanitary Services |
| Source / Verified | US Census 1987 SIC Concordance / 2026-06-28 |
Related Resources & Compliance Guides
Further regulatory reference links for legacy SIC code 4939:
- SIC Codes Complete Compliance Guide — Detailed history and active legal applications of the SIC classification framework.
- Why Legacy SIC Codes Persist Guide — How credit systems and the SEC still rely on SIC metadata.
- SIC ↔ NAICS Crosswalk Tool — Trace industrial code conversions dynamically.
- SIC Major Group 49 Hub — View other legacy industries in this business division.
Related Industries in Major Group 49
Frequently Asked Questions (FAQ)
What industry does SIC code 4939 represent?
SIC 4939 is 'Combination Utilities, NEC', a 4-digit Standard Industrial Classification (SIC) code under Major Group 49: Electric, Gas, and Sanitary Services (Division E: Transportation, Communications, Electric, Gas, and Sanitary Services); it maps to modern 2022 NAICS code(s): 221210 (Natural Gas Distribution), 221112 (Fossil Fuel Electric Power Generation).
What is the modern 2022 NAICS mapping for SIC 4939?
SIC code 4939 maps to modern NAICS codes: 221210 - Natural Gas Distribution, 221112 - Fossil Fuel Electric Power Generation, 221113 - Nuclear Electric Power Generation, 221111 - Hydroelectric Power Generation, 221117 - Biomass Electric Power Generation, 221118 - Other Electric Power Generation, 221116 - Geothermal Electric Power Generation, 221114 - Solar Electric Power Generation, 221115 - Wind Electric Power Generation, 221122 - Electric Power Distribution, 221121 - Electric Bulk Power Transmission and Control.