FMCSA Is Eliminating MC Numbers in 2025: Here's What You Need to Know

Abby Willroth is a NAADAC-qualified Substance Abuse Professional located in Central Arkansas. If you have questions pertaining to DOT Alcohol & Drug Testing Regulation, the Role of a SAP or the Return-To-Duty process, ASK A SAP!"

The landscape of motor carrier registration is about to change in a major way.

In a move toward streamlining its registration and identification processes, the Federal Motor Carrier Safety Administration (FMCSA) announced that it will officially eliminate MC (Motor Carrier) numbers beginning in late 2025. Going forward, carriers will only be identified by their USDOT numbers.

Why the Change?

For decades, motor carriers operating across state lines were required to have both a USDOT number and an MC number. While the USDOT number served primarily as an identifier for safety monitoring, the MC number was tied to a carrier's "authority to operate" in interstate commerce.

This dual-identification system often led to confusion, duplicate filings, and administrative headaches. By shifting to a single USDOT-only system, FMCSA aims to modernize the process, improve efficiency, and make it easier for carriers, brokers, and shippers to verify compliance.

Key Points You Need to Know:

🔹 All carriers, brokers, and freight forwarders will use their USDOT number as their sole identifier.

🔹 FMCSA will introduce a modernized online registration platform to replace the old Unified Registration System (URS).

🔹 Carriers will still be required to maintain their authority to operate — but it will be tracked through the USDOT number, not a separate MC number.

🔹 Expect new fees and revised processes for registration, insurance filings, and BOC-3 form submissions.

Does This Impact Existing MC Numbers?

Yes. Once the change is implemented, MC numbers will no longer be issued, displayed, or used to verify operating authority. Existing MC numbers will essentially become obsolete, though historical records will be maintained for reference.

What Should Carriers Do Now?

1. Stay Informed: Watch for FMCSA announcements, webinars, and official training materials as we get closer to the implementation date.

2. Prepare Your Records: Make sure your USDOT number registration is accurate, up to date, and in good standing.

3. Bookmark FMCSA's Modernization FAQs: They have launched an excellent FAQ resource to answer initial questions about the modernization effort: FMCSA Modernization FAQs

   
   

Final Thoughts

This is a big shift for the industry, but it's ultimately aimed at reducing bureaucracy and creating a clearer, more user-friendly system. Carriers who stay proactive and informed will be best positioned for a smooth transition.

Staying compliant today means staying competitive tomorrow.