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What's the Difference Between an MC and an MX Number?

2025-04-21 16:25:00
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Complying with federal regulations is crucial for maintaining safe and legal business operations in the trucking industry. However, the industry uses multiple alphanumeric codes to identify motor carriers and other commercial vehicle operators.

As such, you might ask questions like "What is an MC or MX number?" or "Must I complete an MC number registration or one for an MX?"

We know how confusing the various codes and federal requirements can be at FMCA Filings. That explains why we go above and beyond to simplify processes for truckers, motor carriers, and others within the industry. Our post below outlines the key differences between the numbers and their importance. 

What Is a Motor Carrier Number (MC)?

A motor carrier number refers to a unique identifier the Federal Motor Carrier Safety Administration (FMCSA) provides to companies that conduct interstate commerce. For-hire carriers may haul freight or passengers; either way, they'll need the number. That includes businesses that transport household goods or specialize in truckload shipping. 

The FMCSA uses MC numbers to monitor the transportation of goods across state lines. It ensures that businesses comply with legal regulations and manage safe operations.

The number must be visible on trucks or provided to certain parties when conducting business. Authorities and stakeholders can use an MC number to access a motor carrier's insurance information, safety records, and penalties for non-compliance with safety regulations if any are available.

What Is a Mexico-Domiciled Carrier Number (MX)?

What is an MC or MX number? An MC identifies motor carriers that operate within the United States, while a Mexico-domiciled carrier number identifies those who do business in the U.S. and Mexico. American motor carriers with primary headquarters in Mexico and companies under the ownership of a Mexican citizen get MX numbers. Still, both codes come from the FMCSA. 

The rules and laws surrounding international border transportation are complex. The purpose of the MX code is to ensure travelers adhere to all legal regulations and safety requirements when crossing the border. The unique code helps authorities track haulers going in and out of the country.

How MC and MX Numbers Differ From Freight Forwarder Numbers

Freight forwarder (FF) numbers are another kind of code that the FMCSA assigns. Would you need one as a motor carrier? The answer is likely no. 

A freight forwarder is a business that facilitates the transport of goods without directly operating any vehicles. The entity is responsible for coordinating freight deliveries on behalf of shippers and handling necessary documentation. Since they don't physically ship or deliver goods, freight forwarders aren't motor carriers and wouldn't need an MC or MX number. 

However, an FF number is similar to MX and MC codes. All three ensure businesses comply with safety regulations. Yet FF numbers are strictly for freight forwarders, and they also ensure businesses fulfill financial responsibility requirements. 

The Importance of MC, MX, and USDOT Numbers

What is an MC or MX number, and how does it differ from a standard USDOT code? A USDOT refers to another regulatory identifier for motor carriers. To obtain and maintain operating authority, every commercial vehicle over 10,000 pounds must have a registered USDOT number. 

All three codes are essential for ensuring businesses within the transportation industry follow all federal safety measures. Authorities use each code to ensure motor carriers stay accountable for operating their businesses within states, across state lines, and over international borders. 

How To Get the Appropriate Identifier for a Vehicle

To get an MX or MC number, you must complete and file an appropriate FMCSA registration form with accurate information about your vehicle and business and wait several days for approval. Unfortunately, mistakes on these forms can affect your operating authority, creating problems for your business. So it's best to file through an experienced service like FMCA Filings. 

Our skilled representatives stay current with the latest industry news and federal regulations. Whether selling MC numbers or filing for an MX for the first time to do business in New Mexico, we can streamline the process. With us, you can be sure you won't miss deadlines or submit forms incorrectly. 

Contact FMCA Filings and Get Help With Your MX or MC Number Application 

Whether you ask, "What is an MC or MX number?" or "How do trucking companies apply for docket numbers?" FMCA Filings can help. We understand FMCSA's stringent regulations and the unique identifiers motor carriers, truckers, freight forwarders, and brokers need to conduct business throughout the country. 

Enjoy hassle-free application filings with us. Chat live with one of our professionals at FMCA Filings today or use our convenient online portal for more information. 

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