MC Number

Definition

An MC number - Motor Carrier number - is the operating authority docket FMCSA issues to for-hire motor carriers, brokers, and freight forwarders. Required by 49 USC §13902 for interstate transportation of regulated commodities or passengers. The MC number is distinct from the USDOT number (which is the safety identifier) and costs $300 per authority type to file. A carrier may hold common-carrier, contract-carrier, broker, and freight-forwarder MC dockets, each requiring a separate filing fee. The MC docket activates only after the BOC-3 and BMC-91 (or BMC-84 for brokers) are on file with FMCSA L&I.