SIC Code 4522 — Air Transportation, Nonscheduled

4-digit industry in the 1987 Standard Industrial Classification — still requested by banks, insurers, SEC filings and legacy systems.

Code	4522
Title	Air Transportation, Nonscheduled
System	SIC 1987 (final edition — replaced by NAICS in 1997)

The SIC was last revised in 1987 and officially superseded by NAICS in 1997, but it never fully disappeared: the SEC still tags EDGAR filings with SIC codes, and many banks, insurers and legacy databases keep requesting it. That is why converting between the two systems is still routine work.

NAICS equivalents of SIC 4522

From the official U.S. Census concordance (1987 SIC → 2002 NAICS). Where the 2002 code no longer exists in NAICS 2022, the closest current code is shown.

NAICS 2002	Title (2002)	Current 2022 code
481211	Nonscheduled Chartered Passenger Air Transportation	481211 (same code)
481212	Nonscheduled Chartered Freight Air Transportation	481212 (same code)
481219	Other Nonscheduled Air Transportation	481219 (same code)
487990	Scenic and Sightseeing Transportation, Other	487990 (same code)
621910	Ambulance Services	621910 (same code)

Other SIC codes in 45xx

• 4512 — Air Transportation, Scheduled
• 4513 — Air Courier Services
• 4581 — Airports, Flying Fields, and Airport Terminal Services

Data: 1987 SIC titles (OSHA/Census) and official Census concordance — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.