MC number
An operating authority identifier used in FMCSA registration contexts for certain carrier, broker, and freight-forwarder records.
Written and reviewed by LaneMath Editorial Team. Updated 2026-06-04. LaneMath pages are maintained as practical carrier education using public references, example-only math, and internal editorial review.
Carrier note
Use this term in context with the rate confirmation, broker communication, facility instructions, and billing paperwork. A short definition is useful, but the written load terms control the actual freight decision.
Carrier example
A carrier treats mc number as a setup or authority item that should be checked against official records when relevant.
Common mistake
Relying on a broker comment instead of checking the official or written setup record when needed.
Paperwork note
For mc number, keep the written instruction or dispatch note close to the rate confirmation so the term has load-specific context.
References and methodology
- Registration and Licensing - Federal Motor Carrier Safety Administration. Used for general compliance context only. LaneMath does not provide compliance advice.
- Industry terminology and editorial explanation - LaneMath Editorial Desk. Editorial explanations are not official guidance, legal advice, or market data.