SIC 9621 — Regulation and Administration of Transportation Programs
Description & Classification
SIC code 9621 representing 'Regulation and Administration of Transportation Programs' 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 488111 - Air Traffic Control (via SIC1987:9621→NAICS1997:488111→2002:488111→2007:488111→2012:488111→2017:488111→2022:488111)
- NAICS 926120 - Regulation and Administration of Transportation Programs (via SIC1987:9621→NAICS1997:92612→2002:926120→2007:926120→2012:926120→2017:926120→2022:926120)
Classification Details
| SIC Code | 9621 |
|---|---|
| Industry Title | Regulation and Administration of Transportation Programs |
| Division | Division J: Public Administration |
| Major Group | Major Group 96: Administration of Economic Programs |
| Source / Verified | US Census 1987 SIC Concordance / 2026-06-28 |
Related Resources & Compliance Guides
Further regulatory reference links for legacy SIC code 9621:
- 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 96 Hub — View other legacy industries in this business division.
Related Industries in Major Group 96
Frequently Asked Questions (FAQ)
What industry does SIC code 9621 represent?
SIC 9621 is 'Regulation and Administration of Transportation Programs', a 4-digit Standard Industrial Classification (SIC) code under Major Group 96: Administration of Economic Programs (Division J: Public Administration); it maps to modern 2022 NAICS code(s): 488111 (Air Traffic Control), 926120 (Regulation and Administration of Transportation Programs).
What is the modern 2022 NAICS mapping for SIC 9621?
SIC code 9621 maps to modern NAICS codes: 488111 - Air Traffic Control, 926120 - Regulation and Administration of Transportation Programs.