SIC 4522 — Air Transportation, Nonscheduled
Description & Classification
SIC code 4522 representing 'Air Transportation, Nonscheduled' 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 621910 - Ambulance Services (via SIC1987:4522→NAICS1997:62191→2002:621910→2007:621910→2012:621910→2017:621910→2022:621910)
- NAICS 481211 - Nonscheduled Chartered Passenger Air Transportation (via SIC1987:4522→NAICS1997:481211→2002:481211→2007:481211→2012:481211→2017:481211→2022:481211)
- NAICS 481212 - Nonscheduled Chartered Freight Air Transportation (via SIC1987:4522→NAICS1997:481212→2002:481212→2007:481212→2012:481212→2017:481212→2022:481212)
- NAICS 487990 - Scenic and Sightseeing Transportation, Other (via SIC1987:4522→NAICS1997:48799→2002:487990→2007:487990→2012:487990→2017:487990→2022:487990)
Classification Details
| SIC Code | 4522 |
|---|---|
| Industry Title | Air Transportation, Nonscheduled |
| Division | Division E: Transportation, Communications, Electric, Gas, and Sanitary Services |
| Major Group | Major Group 45: Transportation by Air |
| Source / Verified | US Census 1987 SIC Concordance / 2026-06-28 |
Related Resources & Compliance Guides
Further regulatory reference links for legacy SIC code 4522:
- 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 45 Hub — View other legacy industries in this business division.
Related Industries in Major Group 45
Frequently Asked Questions (FAQ)
What industry does SIC code 4522 represent?
SIC 4522 is 'Air Transportation, Nonscheduled', a 4-digit Standard Industrial Classification (SIC) code under Major Group 45: Transportation by Air (Division E: Transportation, Communications, Electric, Gas, and Sanitary Services); it maps to modern 2022 NAICS code(s): 621910 (Ambulance Services), 481211 (Nonscheduled Chartered Passenger Air Transportation).
What is the modern 2022 NAICS mapping for SIC 4522?
SIC code 4522 maps to modern NAICS codes: 621910 - Ambulance Services, 481211 - Nonscheduled Chartered Passenger Air Transportation, 481212 - Nonscheduled Chartered Freight Air Transportation, 487990 - Scenic and Sightseeing Transportation, Other.