SIC 4581 — Airports, Flying Fields, and Airport Terminal Services
Description & Classification
SIC code 4581 representing 'Airports, Flying Fields, and Airport Terminal Services' 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 SIC1987:4581→NAICS1997:488111→2002:488111→2007:488111→2012:488111→2017:488111→2022:488111)
- NAICS 238990 - All Other Specialty Trade Contractors (via SIC1987:4581→NAICS1997:56172→2002:238990→2007:238990→2012:238990→2017:238990→2022:238990)
- NAICS 561720 - Janitorial Services (via SIC1987:4581→NAICS1997:56172→2002:561720→2007:561720→2012:561720→2017:561720→2022:561720)
- NAICS 488119 - Other Airport Operations (via SIC1987:4581→NAICS1997:488119→2002:488119→2007:488119→2012:488119→2017:488119→2022:488119)
- NAICS 488190 - Other Support Activities for Air Transportation (via SIC1987:4581→NAICS1997:48819→2002:488190→2007:488190→2012:488190→2017:488190→2022:488190)
Classification Details
| SIC Code | 4581 |
|---|---|
| Industry Title | Airports, Flying Fields, and Airport Terminal Services |
| 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 4581:
- 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 4581 represent?
SIC 4581 is 'Airports, Flying Fields, and Airport Terminal Services', 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): 488111 (Air Traffic Control), 238990 (All Other Specialty Trade Contractors).
What is the modern 2022 NAICS mapping for SIC 4581?
SIC code 4581 maps to modern NAICS codes: 488111 - Air Traffic Control, 238990 - All Other Specialty Trade Contractors, 561720 - Janitorial Services, 488119 - Other Airport Operations, 488190 - Other Support Activities for Air Transportation.