Onramp Carrier

There is no MC number any more — what replaced it

The FMCSA stopped issuing new MC, FF and MX docket numbers on 1 October 2025. If you are registering now, you will not receive one — your USDOT number is the identifier, and your operating authority is recorded against it. Numbers already issued have not been withdrawn.

Last reviewed 4 August 2026

What exactly changed?

The FMCSA has run two parallel identifiers for years: the USDOT number, which identifies the company, and a docket number, which came attached to operating authority. Motor carriers got MC, freight forwarders FF, Mexican carriers MX.

That second identifier is no longer issued. New authority is granted and recorded against the USDOT number alone. It is one number now instead of two.

I am applying now. What do I get?

A USDOT number, and operating authority recorded against it. Nothing else about the process changed: you still pay $300 per authority type, you still need proof of insurance filed by your insurer, and you still need a BOC-3 process agent designation on file before authority is granted.

The full sequence is in how to get operating authority.

I already have an MC number. Is it dead?

No. Existing numbers were not cancelled, and they still appear on records. What stopped is the issuing of new ones.

Reporting on how long existing docket numbers will continue to be treated as active identifiers has not been consistent, and it is the one part of this change worth checking for yourself rather than taking from any article — including this one. Look your own record up with the FMCSA directly.

Brokers keep asking for my MC number. What do I tell them?

Give them your USDOT number. A carrier registered after October 2025 does not have a docket number to give, and its absence is not a sign that anything is wrong with the registration.

Expect friction for a while. Load boards, broker packets, factoring applications and insurance forms were all built around a field labelled “MC #”, and they will not all be updated at the same speed. If a form will not accept a submission without one, that is the form's problem — say so, and give the USDOT number.

Does this change my BOC-3?

No. The requirement is unchanged: you need a process agent designated in every state you operate in, and the filing has to come from that agent rather than from you.

A designation already on record stays on record. The one thing that genuinely invalidates one is a change to your legal name, which is a separate matter from any of this.

Does this change UCR?

No. UCR registration is administered by the states through the UCR Plan, not by the FMCSA registration system, and it is still owed every year based on your fleet size.

Why did they do it?

The stated aims are modernisation and fraud reduction. Two identifiers for one entity created room for confusion and for misuse — a docket number could be presented in contexts where the safety record attached to the USDOT number told a different story. Consolidating onto one identifier makes the record harder to misrepresent.

It arrived alongside Motus, the registration system that replaced the old one.

Need your BOC-3 filed?

Enter your USDOT number and we prefill the rest from the FMCSA registry — one flat fee, all 50 states, filed the same day.

File my BOC-3UCR registration

Related guides

What is a BOC-3?
The FMCSA form that names who can accept legal papers for you in every state. What it is for, who needs one, and why it is the last thing standing between most applicants and their authority.
The BOC-3 form: can you file it yourself?
You can download Form BOC-3, and for most carriers it will do you no good — only a process agent may file it. What the form contains and who the exception applies to.
FMCSA Motus: the new registration system, explained
Motus replaced the Unified Registration System as the FMCSA's registration front door. What changed, what did not, and when you will actually encounter it.
How to get operating authority (and why there is no MC number any more)
New applicants no longer receive an MC number — the USDOT number is the identifier now. The full sequence from registration to active authority, what it costs, and the two filings that get most applications dismissed.
BOC-3 vs process agent: what's the difference?
A BOC-3 is the form; a process agent is who it names. Why carriers can't file it themselves, and what happens when a designation lapses.
What happens after you file a BOC-3
How long recording takes, how to check it actually landed, and why a BOC-3 on its own still won't get your authority granted.
MCS-150 biennial update: when yours is due
Your USDOT number tells you the month and the year. Miss it and the number is deactivated — and you owe the update even if nothing changed.
UCR requirements: who registers, and in which state
Who owes the Unified Carrier Registration, how your fleet count is worked out, and how your base state is chosen when your own state does not take part.
IFTA explained: who needs it and what counts
The fuel tax agreement covering 48 states and 10 provinces. What makes a vehicle qualify, who your base jurisdiction is, and why this one isn't an FMCSA filing at all.