MC Authority
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What is an MC Number?
An MC Number, or Motor Carrier Number, is a unique identifier assigned by the Federal Motor Carrier Safety Administration (FMCSA). It was introduced as part of the Motor Carrier Act of 1935. Implementing MC Numbers provided a systematic way to track and manage commercial carriers. Over time, these regulations have evolved to adapt to the industry’s growing and changing needs.
The Different Types of Operating Authority

Carrier of Property
A for hire motor carrier that transports regulated property owned by others for compensation.

Passenger Carrier
A for hire motor carrier that transports passengers for compensation.

Household Goods
A for hire motor carrier that transports household goods (other peoples' personal belongings) for compensation (i.e. a moving company).

Broker of Property
A person or company that arranges or offers to arrange for transportation of property by an authorized motor carrier. Brokers do not assume responsibility for the cargo.
Benefits of Having an MC Number Beyond Legal Compliance
An MC Number is not just a regulatory requirement but offers several advantages that can significantly benefit your business. Here are some key benefits:
- Business Growth
- Partnership Opportunities
- Operational Efficiency
- Financial Advantages
- Competitive Edge
- Legal Protections
Differences Between an MC Number and a USDOT Number
DOT Number
A DOT Number acts like a driver’s license for your trucking company. You can get a DOT Number to verify with the FMCSA that your company is operating as a trucking company.
- Needed for interstate commerce
- Needed for intrastate commerce
- Needed to haul your own property
- Needed to haul your own construction equipment
- Working for-hire to haul someone else’s property
MC Number
An MC Number is also called operating authority or trucking authority. Operating authority is most commonly needed when you’re planning on working for-hire in interstate commerce (hauling loads in more than one state) or hauling hazardous materials.
- Needed for interstate commerce
- Working for-hire to haul someone else’s property
Frequently Asked Questions
An MC Number, or Motor Carrier Number, is a unique identifier given by the Federal Motor Carrier Safety Administration (FMCSA) to companies that transport goods or passengers for a fee. It’s crucial for doing business across state lines.
If you are a for-hire carrier, meaning you get paid to transport goods or passengers, and you operate in interstate commerce, you need an MC Number. This applies to trucks, buses, and other commercial vehicles.
Operating without an MC Number when you need one can result in hefty fines and legal issues. It’s not just about compliance; having an MC Number also boosts your credibility with clients and partners.