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A smiling man in a yellow safety jacket and hat stands confidently in front of a truck, with a blue background detailing "What is MX Number & How to get it."

June 3, 2022

MX Number is assigned by the Federal Motor Carrier Safety Administration (FMCSA) to Mexico Domiciled carriers who want to operate within the United States and across the United States/Mexico international border commercial zones. 

In addition to the MX Number, Mexico Domiciled carriers also require a Mexican Certificate of Registration for commercial-zone operations, or long haul Provisional or Standard Operating authority registration, and a USDOT number.

How to get a Mexican Carrier (MX) number

Filling the MCS-150 form is the first step toward getting your Mexican Carrier (MX) Number.

Now depending on the type of transportation, a Mexican Domiciled carrier can consider the following operating authority:

  • Commercial-Zone Authority: Commercial Zone areas are along the southern U.S. border, or locations described in 49 CFR 372, subpart B that are free from certain regulatory provisions. 

The applicant can visit the Unified Registration System to complete an OP-2 form.

  • Long Haul Operating Authority: Long-distance transportation covered by the commercial Trucks for a distance of 250 miles or above. 

The applicant has to complete the OP-1 (MX) form.

  • Designation of Agents: Form BOC-3

After completing the OP-2, OP-1 (MX), and BOC-3 forms, the applicant has to mail them to the address mentioned in each form. 

For Long Haul Operating Authority carriers have to pay a Non-Refundable fee, payment instructions are described in the OP-1 (MX).

Estimated time to get a Mexican Carrier Number

The estimated time to obtain Mexican Carrier( MX) Number varies depending on the application submitted and the means by which the application is submitted.

  • The USDOT number can be obtained online on the day the application is submitted.
  • OP-1 (MX) is processed within 4-6 weeks after completion of the application.
  • It takes approximately 4 weeks to issue Commercial-Zone Operating Authority after completion of the OP-2 form.

After the application is processed, the carrier has to submit to and pass a Pre-authorization Safety Audit (PASA). Once the PASA is completed, the FMCSA will notify the carrier about the results and of the requirement to submit evidence of insurance to FMCSA.

Simultaneously, the carrier information will be published in the FMCSA register to allow for a 10-day protest period. 

At the end of the protest period and upon the receipt of evidence of insurance and the BOC-3, Designation of process agent form, the provisional authority will be issued.

But getting the Mexican Carrier number can be a complicated process and there is no room for an error. An error will put an extra burden on your pocket and also require more time to get your Mexican number. 

So let a professional handle this process for you. DOT Compliance Group has years of experience in the trucking industry, and we have helped a number of carriers to get their MX numbers. 

Get your Mexican Carrier (MX) Number now at DOT Compliance Group.

FAQ

What Happens If You Fail a DOT Inspection?

If the vehicle or driver is deemed unsafe, they may be placed out of service, meaning the vehicle cannot operate until all violations are properly corrected.

Who decides which level of inspection to perform?

Both the Commercial Vehicle Safety Alliance (CVSA) and the Federal Motor Carrier Safety Administration have a part in DOT inspection levels. The CVSA develops the criteria and sets the procedures for every inspection level. The FMCSA establishes overall regulations and determines which vehicles must be inspected.

How often do DOT inspections happen?

DOT inspections can happen at any time. They most commonly happen during roadside stops and weigh stations. Carriers with higher risk, poor safety records, or hazardous material may be inspected more frequently.

What documents are required during an inspection?

Documents required during an inspection include but may not be limited to:

  • State driver’s license or commercial driver’s license
  • Medical examiner’s certificate
  • Record of duty status
  • Vehicle registrations
  • Periodic inspections document for all vehicles being operated
  • Shipping papers or bills of lading
  • Information for hazardous materials being transported
  • Proof of insurance

What are common DOT inspection violations?

According to the FMCSA, the 5 most cited roadside violations are:

  1. False Report of Driver’s Record of Duty Status: log falsification providing inaccurate or intentionally altered duty-status information.
  2. No Record of Duty Status (ELD Required): using a commercial vehicle without the required electronic logging device or valid time records.
  3. Inoperable Required Lamp: crucial lights (headlights, brake lights, turn signals, etc.) are not functioning properly.
  4. Operating a Commercial Motor Vehicle Without a Commercial Driver’s License (CDL)
  5. Operating a Commercial Motor Vehicle Without Proof of a Periodic Inspection: failure to meet FMCSA the maintenance standards of a required annual inspection.

Why is updating VMT important for compliance?

VMT is tracked to determine fuel tax obligations (Vehicle Miles Traveled Tax) used for road maintenance and improvements. Trucking companies must keep accurate records of VMT to ensure they pay the correct amount of taxes.

How often should VMT be updated?

For motor carriers VMT must be updated every two years along with the MCS-150 form for the Biennial Update.

Can VMT be tracked automatically with technology?

Yes, Electronic Legging Devices (ELDs), Fleet Management Apps, and Mileage Tracking Software are all technological advancements that can simplify the process of VMT tracking.

How does VMT affect taxes and fuel reporting?

Accurate VMT records help document mileage for business-related tax deductions, ensuring compliance with IRS regulations. It also supports fuel tax reporting by tracking the miles each vehicle travels in different jurisdictions, which is essential for state and federal fuel tax calculations. Proper tracking reduces errors, prevents penalties, and provides a clear record of operational costs.

How do I know when my Biennial Update is due?

  • Your filing schedule depends on the last two digits of your USDOT number. The last digit corresponds with what month the form needs to be filed in. January is 1, February is 2, March is 3, etc. The next to last digit determines the year (odd-numbered year or even numbered year). For example, DOT number 1234567 files their biennial update in July (7) of every even year (6). Contact us today to see if you’re due.

Does the Biennial Update cost money to file?

While you can file your Biennial Update yourself for no cost through FMCSA. The process can often be confusing and time-consuming. Our team can handle your filing for you, simplifying the process for you.

Do intrastate carriers need to file the update?

Yes, even if carriers stay within state lines, a biennial update is still needed for their USDOT number.

What happens if I miss my filing deadline?

  • Failure to complete biennial update to FMCSA can be subject to fines with a maximum penalty of $10,000. If your update is past due, you can still file it to restore your compliance status. Contact us today to file your form! https://dotcompliancegroup.com/bu-update/ 

What are the new FMCSA rules in 2025?

  1. Civil Penalty Amount Increases
  2. Drug & Alcohol Clearinghouse Becomes Exclusive Source for checking driver history.
  3. ELD Technology Required
  4. SMS (Safety Measurement System) Modernization
  5. Crash Preventability Determination Program Expanded

When do the 2025 FMCSA regulations take effect?

The confirmed dates these regulations take effect is May 30, June 23, October 1, 2025.

How can trucking companies prepare for these changes?

Regularly reviewing your Safety Measurement System (SMS) scores and maintaining personal checklists for inspections, driver qualification files, and drug and alcohol testing helps catch issues before they affect audits. Partnering with DOT Compliance Group streamlines filings, reporting, and ongoing monitoring, taking the guesswork out of FMCSA regulations and keeping your operation audit-ready year-round.

What Triggers a DOT Compliance Review?

A DOT compliance review is triggered when FMCSA wants to ensure a carrier is following safety regulations. Common triggers include high SMS safety scores, a history of crashes or violations, and previous noncompliance. Staying proactive with accurate records, driver files, and regular internal audits helps reduce the likelihood of a review.

Where can I get help with FMCSA filings?

DOT Compliance Group can assist with any help or questions you may have about FMCSA filings. Call 972-476-9962.

How long are violations kept on record?

According to the Clearinghouse rules, drug and alcohol violations remain in the FMCSA Clearinghouse for five years, provided all requirements (such as completing the return‑to‑duty process) have been met before that period ends.

What if an employer makes a mistake in reporting?

In practice, correcting an employer reporting error typically involves identifying the mistake in the database and then submitting a request for correction through the Clearinghouse portal or FMCSA procedures, so the record reflects accurate information. 

What are the penalties for non-compliance?

FMCSA rules allow civil penalties for non‑compliance, and separate authorities note that employers who fail to meet Clearinghouse requirements may face civil fines or criminal penalties under federal regulations.

Do trucking companies check the Clearinghouse?

Yes — trucking companies check the Clearinghouse as part of their hiring and compliance process. The FMCSA Clearinghouse is designed so employers can search a driver’s drug and alcohol violation records before permitting them to operate a commercial vehicle. Employers are required to conduct these queries for both prospective and current drivers as part of compliance.

How MOTUS Changes Daily Compliance Operations

MOTUS primarily changes system access and verification, not safety rules. Login issues, verification delays, or profile errors could temporarily affect filing ability if not addressed early. Even when regulations themselves remain unchanged, system transitions can create operational confusion. Proper preparation helps prevent disruptions in daily compliance operations.

When will MOTUS fully launch for motor carriers?

Phase 2 of MOTUS, which includes motor carriers, brokers, and freight forwarders, is expected mid-to-late 2026. During this phase, users will create accounts, complete business verification, and begin filing through the system. Post-launch enhancements and refinements will continue afterward.

Who is required to use MOTUS?

MOTUS will apply to interstate carriers, brokers, freight forwarders, passenger carriers, and Mexico-domiciled carriers operating in the U.S. Intrastate requirements remain governed by state regulations, though some states still require USDOT registration. For authority holders, additional insight is available in our guide to Motus registration for carriers and brokers.

Does MOTUS replace the FMCSA Portal?

MOTUS does not directly replace the FMCSA Portal. It modernizes and centralizes functions currently spread across multiple systems. Over time, it will replace legacy registration platforms.

Does MOTUS replace the Unified Registration System (URS)?

MOTUS is part of the FMCSA’s broader modernization effort and is intended to replace fragmented registration processes, including legacy URS functions. It consolidates and modernizes legacy registration systems over time, but does not change the core regulatory requirements for carriers.

Will MOTUS eliminate MC, FF, or MX numbers?

No, MOTUS will not eliminate MC, FF, or MX numbers. The modernization affects access and verification — not authority structure. Existing authority numbers stay valid; MOTUS only changes how registration data is accessed and managed.

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