DOT REGISTRATION — WHAT'S COMING
Is the MC number going away?
Short version: it is proposed, not final. FMCSA is modernizing registration with a new system called Motus — here is what is actually changing and what it means for a new carrier today.
SHORT ANSWER
Is FMCSA eliminating the MC number?
Not as a final rule. FMCSA is modernizing its registration system — the Motus: USDOT Registration System — and has proposed phasing out separate MC/MX/FF docket numbers. Under the proposal, the type of operating authority would instead be shown as a suffix on the USDOT number (one number, with suffixes) rather than a separate MC number.
This is not final. Eliminating docket numbers is still under consideration and would require a formal Notice of Proposed Rulemaking (NPRM) and public comment before it could take effect. And existing MC, MX, and FF numbers will not change — current numbers stay the same. The Motus system itself launches to all users, new and existing, in May 2026.
Sources: FMCSA — What's Coming · FMCSA — Registration Modernization FAQs · last reviewed June 2026
What is proposed, and what is already settled?
It helps to separate the parts that are firm from the part that is still only a proposal.
- Settled — the Motus system is coming. FMCSA's Motus: USDOT Registration System launches to all users, new and existing, in May 2026.
- Settled — your existing MC number does not change. Current MC, MX, and FF numbers stay the same.
- Proposed, not final — phasing out docket numbers. FMCSA has proposed replacing separate MC/MX/FF numbers with a suffix on the USDOT number. This is still under consideration and would require a formal NPRM and public comment before it could take effect.
- For a new carrier today: you still obtain and use MC operating authority the normal way. This is a change to watch, not one that is in effect.
Sources: FMCSA — What's Coming · FMCSA FAQ — will existing MC numbers be replaced? · last reviewed June 2026
What does this mean for me right now?
It depends on whether you already have an MC number or are getting one now.
| Situation | What applies today |
|---|---|
| You already have an MC number | Your existing MC, MX, or FF number does not change. Keep using it as you do now. |
| You are a new carrier getting authority now | You still obtain and use MC operating authority the normal way. The proposed docket-number change is not in effect. |
| The Motus system | Launches to all users — new and existing — in May 2026. |
| Phasing out docket numbers | Proposed and under consideration only — would require a formal NPRM and public comment first. Verify the current status with FMCSA. |
Sources: FMCSA — What's Coming · FMCSA — Modernization FAQs · last reviewed June 2026
We keep your FMCSA filings current as the system changes
Vertical Identity already helps carriers keep their FMCSA filings current — including MCS-150 updates in the new Motus system — so as registration modernizes, we keep you compliant.
New to all of this? Start with the full new-authority checklist, and see the difference between your two main numbers in USDOT number vs MC number.
Frequently asked questions
Is FMCSA getting rid of MC numbers?
Not as a finalized rule. FMCSA has proposed phasing out separate MC/MX/FF docket numbers as part of its registration modernization — under the proposal, the type of operating authority would instead appear as a suffix on the USDOT number. This is still under consideration and would require a formal Notice of Proposed Rulemaking (NPRM) and public comment before it could take effect. Verify the current status with FMCSA.
Will my existing MC number change?
No. Existing MC, MX, and FF numbers will not change — current numbers stay the same. The proposed change concerns how operating authority would be identified going forward, not a renumbering of carriers who already have an MC number. Verify with FMCSA.
When does the new Motus system start?
FMCSA’s Motus: USDOT Registration System launches to all users — new and existing — in May 2026. The separate question of whether docket numbers are eventually phased out is still proposed, not final. Verify timing and status with FMCSA.
Stay compliant as FMCSA modernizes
We keep your filings current and handle your drug and alcohol program, Clearinghouse queries, and driver qualification files.
Enroll in the consortiumThis is general guidance, not legal advice. Verify requirements with FMCSA and your state DOT.