What Is an MC Number?
How MC numbers relate to operating authority and why they are different from USDOT numbers.
By CarrierDataHub Data Team · Updated
An MC number is a docket number historically associated with federal operating authority. Brokers and for-hire carriers often use MC numbers in qualification workflows because authority status, insurance filings, and related public records may be tied to the docket.
A company may have a USDOT number without a usable MC authority for the freight move in question. It may also have multiple docket prefixes, such as MC, MX, or FF, depending on the type of authority. The prefix is not a decoration; it points to the kind of registration involved.
What this means in practice: if a profile lists an MC number, verify it in the FMCSA Licensing & Insurance public system. Confirm the authority type, status, effective dates where available, and insurance filings before booking or tendering freight.
Do not rely on a screenshot, an email signature, or a directory listing as proof of authority. Docket information can change, and the official public record is the place to resolve conflicts.
Related glossary terms
- MC Number
A docket number commonly associated with operating authority. - Operating Authority
Permission recorded in federal systems for certain regulated transportation activities. - Docket Number
A public authority identifier such as MC, MX, or FF.
Other guides
- What Is a USDOT Number?
A practical explanation of USDOT numbers and where they appear in public motor carrier records. - USDOT vs MC Number
The difference between identification records and authority records in trucking data. - Carrier vs Broker vs Freight Forwarder
A plain-language distinction among common transportation entity types. - How to Verify a Trucking Company
A concise verification workflow using public identifiers and official FMCSA systems.