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Corrections, source discrepancies, improvement suggestions, and editorial partnerships.

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Project news and behind-the-scenes.

Data corrections — if you spot an error in a NAICS code description, SBA standard, SIC mapping, or crosswalk entry.
Source discrepancies — if a value on this site differs from the official source document.
Missing codes — if a classification code is absent from the expected list.
Editorial partnerships — for cross-promotion or content collaboration between classification reference sites.
General feedback — usability improvements or feature requests.

This is a volunteer-maintained project. We respond within 3 business days. Corrections supported by an official source reference are prioritized.

For official classification inquiries, contact the relevant government agency directly: