Trucking: mc number, motor carrier number, us dot number

Question
what is the purpose for this number?  and who needs to have this number?

Answer
The MC Number stands for Motor Carrier Number.  If you will haul freight for hire which means you haul property that belongs to others for compensation across state lines you must obtain a MC Number from the FMCSA. The USDOT Number is also required as well as other permits depending on the gross vehicle weight of equipment and state that you will travel through.  Please visit my web site www.dotnumber.net for additional information.