SIC Code 9999 — Nonclassifiable Establishments
4-digit industry in the 1987 Standard Industrial Classification — still requested by banks, insurers, SEC filings and legacy systems.
| Code | 9999 |
|---|---|
| Title | Nonclassifiable Establishments |
| 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The SIC was last revised in 1987 and officially superseded by NAICS in 1997, but it never fully disappeared: the SEC still tags EDGAR filings with SIC codes, and many banks, insurers and legacy databases keep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.
Convert SIC codes in bulk
Use the free SIC to NAICS crosswalk (paste whole lists), search by activity with the NAICS lookup, or automate via the API.
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.