SIC 6331 — Fire, Marine, and Casualty Insurance
Description & Classification
SIC code 6331 representing 'Fire, Marine, and Casualty Insurance' 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 524126 - Direct Property and Casualty Insurance Carriers (via SIC1987:6331→NAICS1997:524126→2002:524126→2007:524126→2012:524126→2017:524126→2022:524126)
- NAICS 524130 - Reinsurance Carriers (via SIC1987:6331→NAICS1997:52413→2002:524130→2007:524130→2012:524130→2017:524130→2022:524130)
- NAICS 525190 - Other Insurance Funds (via SIC1987:6331→NAICS1997:52519→2002:525190→2007:525190→2012:525190→2017:525190→2022:525190)
- NAICS 524128 - Other Direct Insurance (except Life, Health, and Medical) Carriers (via SIC1987:6331→NAICS1997:524128→2002:524128→2007:524128→2012:524128→2017:524128→2022:524128)
Classification Details
| SIC Code | 6331 |
|---|---|
| Industry Title | Fire, Marine, and Casualty Insurance |
| Division | Division H: Finance, Insurance, and Real Estate |
| Major Group | Major Group 63: Insurance Carriers |
| Source / Verified | US Census 1987 SIC Concordance / 2026-06-28 |
Related Resources & Compliance Guides
Further regulatory reference links for legacy SIC code 6331:
- 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 63 Hub — View other legacy industries in this business division.
Related Industries in Major Group 63
Frequently Asked Questions (FAQ)
What industry does SIC code 6331 represent?
SIC 6331 is 'Fire, Marine, and Casualty Insurance', a 4-digit Standard Industrial Classification (SIC) code under Major Group 63: Insurance Carriers (Division H: Finance, Insurance, and Real Estate); it maps to modern 2022 NAICS code(s): 524126 (Direct Property and Casualty Insurance Carriers), 524130 (Reinsurance Carriers).
What is the modern 2022 NAICS mapping for SIC 6331?
SIC code 6331 maps to modern NAICS codes: 524126 - Direct Property and Casualty Insurance Carriers, 524130 - Reinsurance Carriers, 525190 - Other Insurance Funds, 524128 - Other Direct Insurance (except Life, Health, and Medical) Carriers.