What Is the Difference Between a DOT Number and an MC Number?

The trucking industry has strict operating authority requirements, and every carrier needs to stay up to date on both DOT and MC number registration requirements if they want to stay compliant. One of the most common questions new carriers ask is, “What is the difference between DOT and MC Numbers?”

The Federal Motor Carrier Safety Administration (FMCSA) assigns these numbers based on whether a company operates within one state or across state lines. When you don't hace the correct number, you can face fines, delays, and legal issues. Carriers who need to register must apply correctly to avoid costly mistakes and disruptions. 

Take the stress and guesswork out of registering, and instead trust FMCA Filings to do it for you. This blog post explains the difference between DOT and MC numbers, who needs them, and how FMCA Filings can handle the entire application process for you.

What Is a USDOT Number?

A USDOT number (Department of Transportation Number) is a custom identifier the Federal Motor Carrier Safety Administration gives out that tracks the carrier’s safety records, audits, inspections, and compliance history.

A USDOT Number is required for carriers that:

• Operate a commercial vehicle with a gross weight rating of 10,001 lbs or more
• Transport hazardous materials that require placards
• Carry passengers for hire with a vehicle designed to transport nine to 15 passengers
• Transport more than 15 passengers, including the driver, whether for compensation or not

Interstate vs. Intrastate Authority

Carriers that cross state lines must register for a USDOT Number to comply with federal regulations. Some states also require intrastate carriers to obtain a USDOT Number, even if they only operate within a single state.

What Is an MC Number?

An MC number  (Motor Carrier Number) is a number assigned to carriers that transport passengers or federally regulated commodities for hire across state lines. It indicates the specific types of transportation services a company is legally allowed to perform.

If your fleet requires this registration but continues operating without an MC number, you could be subject to serious fines.

USDOT Numbers vs. MC Numbers: What's the Difference?

The main difference between a DOT and an MC number comes down to where and how a carrier operates.

• Officials require USDOT numbers for both interstate and intrastate carriers that operate a commercial vehicle over 10,001 lbs, transport hazardous materials, or carry passengers. Authorities use this number to track safety compliance, inspections, and audits.
• Officials require MC numbers for carriers that cross state lines while transporting passengers for hire or hauling federally regulated commodities. This number indicates which type of transportation the carrier is legally allowed to perform.

If a carrier operates only within one state and does not transport regulated commodities or passengers across state lines, they may not need an MC number. However, most trucking businesses require a USDOT number to comply with federal and state regulations anyway.

How To Apply for a USDOT and MC Number

Now that you know the difference between DOT and MC numbers, find out how to register for them. Freight companies must apply for USDOT and MC numbers through the Unified Registration System (URS) correctly to avoid delays or penalties.

Applying for a USDOT Number

To apply for a USDOT Number, a carrier must first gather their business details, including their company name, operation type, cargo classification, and vehicle ownership. Once they collect this information, they can submit an application through FMCA Filings, where our experts will handle the filing process. 

After application processing is complete, you'll receive your USDOT number. FMCA Filings will continue to provide ongoing support so your registrations stay up-to-date and compliant with federal and state regulations.

Applying for an MC Number

Carriers that need an MC number must first determine whether their business requires one based on interstate vs. intrastate authority. They can then submit their application through FMCA Filings, where our specialists manage the entire process from start to finish. As part of the application, carriers must pay the $300 filing fee per operating class. 

Processing times typically take 20 to 25 business days, but FMCA Filings ensures all details are correct to avoid rejections and unnecessary delays.

Get the Right Registration Without the Hassle – Contact FMCA Filings

Running a trucking business comes with enough challenges. Getting a USDOT number or MC number should not be one of them. A small mistake in your registration can lead to fines, delays, or even trucks being pulled off the road.

FMCA Filings makes it simple. Instead of dealing with confusing paperwork, let our team handle everything for you. We file your USDOT and MC number applications correctly the first time.

If you are still unsure about the difference between DOT and MC numbers or need help renewing your MC number registration, FMCA Filings has the answers. Contact us today to get started.