Is the MC number going away? What's actually changing

Not yet: MC numbers still exist in October 2026, FMCSA is still issuing them, and eliminating them would take either a future FMCSA rulemaking or a new law. When FMCSA launched its Motus registration system in May 2026, it kept MC, MX and FF docket numbers, kept their prefixes and left every existing number unchanged. What it changed is how new numbers are issued.

The confusion is understandable, because two different things are in motion. FMCSA has wanted to replace docket numbers with the USDOT number since at least 2013, and a bill in Congress, the SAFER Transport Act, would order it. Neither has happened.

A USDOT number identifies a regulated company to FMCSA, and the company's safety record hangs off it. An MC number is a docket number for operating authority: FMCSA's permission to haul regulated freight for hire across state lines, or to act as a broker. A carrier that hauls regulated freight for hire across state lines has both, and one USDOT number can sit over several dockets.

FMCSA already treats the USDOT number as the main identifier. Its 2026 Motus notice says the agency “will continue to identify all regulated entities by a USDOT Number as the unique identifier.” The MC number survives because so much of the industry's paperwork, contracts, load boards and habits are built around it, and stakeholders told FMCSA they needed time to adjust.

The idea is old. FMCSA's 2013 Unified Registration System final rule planned to stop issuing MC numbers and make the USDOT number the single identifier. For brokers and freight forwarders, the rule said, the USDOT number “will simply be a replacement for the MC Numbers or FF Numbers.” The agency argued it could still catch reincarnated carriers “because a motor carrier's safety history is associated with its USDOT Number, not its MC Number.”

That rollout stalled. URS went live only for first-time applicants in December 2015, and in January 2017 FMCSA indefinitely suspended it for existing registrants (82 FR 5292). Docket numbers carried on.

Motus was the next attempt, and FMCSA pulled back again. Its April 2026 notice says stakeholders raised concerns about three things, including “the elimination of the Motor Carrier (MC) and Freight Forwarder (FF) Docket Numbers,” and that Phase II would not include that change. FMCSA said it will take “a measured approach to implement these changes in later releases.”

The fraud argument for retiring them is simple. When authority lives under a separate number that can be sold along with a shell company, an aged MC number becomes a product. FMCSA's own notice lists the “selling of motor carrier numbers” among the fraud it is fighting, and change-of-ownership fraud shows how bought authorities get used against factors.

Motus changed how new docket numbers are issued, not whether they exist. Here is FMCSA's description, checked against its Motus datasets.

The randomization shows up plainly in FMCSA's Company Census. USDOT numbers added in early May 2026 ran in sequence in the 4.58 million range; numbers added since the launch are scattered across the seven-digit range, up to nearly 10 million. A higher number no longer means a newer carrier, so compute authority age from grant dates. Our carrier check does that for you.

The one-docket-per-authority rule also means a company that gets both carrier and broker authority in Motus holds two MC numbers. If your system assumes one MC number per carrier, it will split one company into two records or merge two authorities into one. The Motus guide covers the rest of the transition.

The SAFER Transport Act, short for the Securing American Freight, Enforcement, and Reliability in Transport Act, is a freight-fraud bill. The House version, H.R. 8267, was introduced on 2026-04-14 by Rep. Brad Knott (R-N.C.) and referred to the Transportation and Infrastructure, Judiciary and Homeland Security committees; on 2026-04-15 it went to the Homeland Security Subcommittee on Border Security and Enforcement. A related Senate bill with the same short title, S. 3950, was referred to the Senate Commerce Committee on 2026-02-26.

As of 2026-10-19, neither bill has moved out of committee. A bill in committee is a proposal, not law, and bills often change or stall at this stage.

What H.R. 8267 would do about MC numbers

Section 5 is the part that matters for identifiers. For the 5 years after enactment, the Secretary of Transportation “shall not issue or renew an MC number” and must phase out references to them. By the 5-year mark, no motor carrier, broker or freight forwarder would hold an MC number, each would have a USDOT number, and the USDOT number would be “the only unique identifier” issued for registration.

Other provisions a factor should know about

The bill would also create a Freight Fraud and Theft Advisory Committee and require a memorandum of understanding between DOT and the Justice Department on referring freight fraud and theft.

There are two routes, and both are slow and public.

• Through FMCSA rulemaking. FMCSA would publish an NPRM in the Federal Register, take public comment, then publish a final rule with an effective date. FMCSA has said this is where docket-number elimination will be proposed, so you would see it coming well before anything changed.
• Through Congress. H.R. 8267 or a successor would need to pass both chambers and be signed. Even then, Section 5 allows 5 years before every MC number is gone.

Under the bill, existing numbers would phase out over that 5-year window; FMCSA hasn't said what transition it would propose. FMCSA's Motus notice is filed under docket FMCSA-2026-1255, a number it corrected on 2026-05-06, and any proposal will appear in the Federal Register.

The practical risk for a factor isn't a sudden switch. It's running systems and documents that assume the MC number is permanent and unique, when it is already neither.

• Make the USDOT number the primary key in your systems and files, and store every docket number as a child record with its type, status and source.
• Accept either a USDOT or an MC number on applications and lookups, and resolve both to the same carrier.
• Expect more than one MC number per carrier for authorities granted in Motus.
• Compute authority age from grant dates, never from how big the number is.
• Identify the carrier by legal name and USDOT number, not just the MC number, on notices of assignment and schedules. Our NOA generator is a quick way to draft one.
• When a rate confirmation shows an MC number, match it to the USDOT number in your file before you fund.
• Track ownership and officer changes on every client now, whether or not a 30-day notice rule ever passes.
• Have counsel review contract language that identifies the carrier only by MC number.

This is general information, not legal advice; talk to counsel before you change contracts or NOAs.

It would take one product off the market, the aged MC number, but not the move behind it. A fraudster can still buy or take over a real company with a long USDOT history, swap its contacts and bank details, and present it to you as an established carrier. The bill's 30-day ownership notice would make that leave a record; it wouldn't stop it.

That's why the identifier is the wrong place to anchor trust. Anchor it on the person who controls the carrier and on the bank account that receives your money, and re-check both every time either changes. The carrier vetting checklist lays out how, and Verified Payee is our version of it.