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CA Number (California DOT Number)

california dot numberA California Department of Transportation (CA DOT) Number is a unique number assigned by the California DMV. If you are a motor carrier with a home base in California then, legally you need to have a CA Number. There are in-state carriers and out-of-state carriers:


In-State Carriers: A commercial vehicle operated only within the state of California must have a Motor Carrier Permit, a CA number, and as of September 2016 a U.S. Department of Transportation (DOT) Number as well.

Out-of-State Carriers: Some out-of-state carriers must have a Motor Carrier Permit and a CA Number in addition to the USDOT Number to enter California.

The USDOT Number is a unique number for your business used to access your company’s safety information. It can be necessary for various check-ups such as audits, crash investigations, compliance reviews, and inspections.


No matter what your home base state is and what states you operate in, DOT requirements stay the same. That means that you are going to need a DOT number if:

  •  your vehicle’s gross weight or combination weight is 10,001 pounds or more;
  •  your vehicle transports more than 8 passengers (including the driver) in exchange for payment;
  •  the vehicle in your name transports more than 15 passengers (including the driver) without compensation.

As a motor carrier or a driver, you are responsible for complying with federal regulations. When you are starting your trucking business, it might be confusing and time consuming. But do not worry – DOT Operating Authority is here to help you!

Displaying CA DOT Number on the Vehicle

After obtaining the CA DOT Number, it must be displayed on both sides of each vehicle. (according to the California Vehicle Code (CVC) Section 34507.5)

Let DOT Operating Authority assist you with getting a California DOT Number!

At DOT Operating Authority it is our goal to help our clients with every aspect of getting authority to operate, starting with a USDOT number and ending with filing for a corporation, and much more in between. Our team is highly professional and has years of experience in various areas of the trucking industry. Whether you need help with truck insurance or CSAT, DOT Operating Authority will be your helping hand.


Give us a call to receive all the information you need, and to start the process of obtaining a USDOT number. We are looking forward to assisting you!