Understanding FMCSA and USDOT Numbers
A USDOT number and an MC number are not the same thing, and knowing the difference is the single most useful check you can run on a company before you hand over a vehicle. One identifies the company to the federal government. The other grants it authority to arrange or provide transportation for hire. A company can hold one and not the other, and what that means for you is worth two minutes of your time.
What Each Number Actually Is
The Federal Motor Carrier Safety Administration, part of the US Department of Transportation, regulates commercial motor vehicles in interstate commerce. Two identifiers come out of that system.
A USDOT number is a unique identifier for a company operating commercial vehicles. It is the file under which the government tracks that company’s safety record: inspections, crashes, audits and compliance reviews. Interstate carriers must have one, and a growing number of states require it for intrastate operation too.
An MC number, formally an operating authority number, grants the legal right to transport regulated commodities for hire across state lines, or to arrange that transportation as a broker. Not every company with a USDOT number needs one, but any company arranging or hauling your vehicle for money across state lines does.
The practical distinction is this: a USDOT number says who they are. An MC number says what they are allowed to do.
Carrier Authority and Broker Authority Are Different
This is where most confusion in vehicle shipping comes from, and it is worth being precise.
Carrier authority means the company physically hauls freight with its own trucks and drivers. Broker authority means the company arranges transportation provided by others. Both are legitimate and most vehicle shipments involve both, because a broker with a national reach finds a carrier already running your lane.
A broker must hold broker authority and post a surety bond, currently set at $75,000, which is a financial guarantee to carriers rather than insurance on your vehicle. A company that says “we are bonded and insured” has told you about that bond and nothing about whether your car is covered.
Some companies hold both authorities. That is normal and not a red flag. What matters is that whoever you are dealing with holds the authority appropriate to what they are actually doing.
How to Check a Company in Two Minutes
This is free, public and the most useful thing on this page.
Go to the FMCSA safety and fitness records system and search by USDOT or MC number, or by company name. Reputable companies display their numbers on their website, and a company that will not give you one when asked has told you something.
Read four things. First, is the operating status active rather than inactive, pending or revoked? Second, what authority do they hold, carrier or broker or both? Third, how long has the entity existed, since a very new number on a company claiming decades of experience is worth a question. Fourth, look at the safety record: inspections, out of service rates and any crash data.
Also check the insurance section, which shows whether required filings are on record and current. A lapsed filing is a live problem rather than a paperwork detail.
What the Safety Data Tells You
The numbers behind a USDOT record are more informative than a star rating, and they are not hard to read.
Out of service rates show what proportion of roadside inspections resulted in the vehicle or driver being pulled from service, measured against a national average. A carrier well above average on either is a carrier with a maintenance or compliance problem.
Crash data is recorded without fault determination, so a number on its own is not a verdict, but a pattern relative to fleet size is meaningful.
For an individual customer this matters less on a broker, who does not operate trucks, and more on the carrier who will actually have your vehicle. Ask which carrier is assigned once it is booked, and look them up.
What These Numbers Do Not Tell You
Being registered is a floor rather than a recommendation, and it is worth being clear about the limits.
An active USDOT number does not mean a company is good at customer service, honest about pricing, or careful with vehicles. It means they are registered and, at that moment, not revoked. Plenty of companies with clean federal records deliver a poor experience.
Equally, the register will not tell you the cargo insurance limit that applies to your specific shipment. That comes from the certificate of insurance for the assigned carrier, which you should ask for on anything valuable.
Use the federal check to eliminate companies rather than to select one. It removes the unregistered and the revoked, and then reviews, references and how they answer questions do the rest. Our guide to what cargo insurance actually covers explains the coverage side.
Red Flags Worth Acting On
A few findings should end the conversation rather than start one.
No USDOT number, or a refusal to provide it, is the clearest. An inactive or revoked status is another. A number registered to a different company name than the one you are dealing with needs explaining, since it can indicate a company operating under somebody else’s authority, which is both illegal and a genuine risk to your vehicle.
A broker presenting itself as a carrier, or the reverse, is worth clarifying before money moves. And a very recently issued number combined with claims of long experience is a straightforward inconsistency.
Common Questions
What is the difference between USDOT and MC numbers? A USDOT number identifies the company and its safety record. An MC number grants authority to haul or arrange transport for hire across state lines.
Where do I look them up? The FMCSA safety and fitness records system, free and public, searchable by number or company name.
Does a broker need its own authority? Yes, broker authority plus a $75,000 surety bond. That bond is a guarantee to carriers, not insurance on your vehicle.
Is an active number enough to trust a company? No. It means registered and not revoked. Use it to rule companies out, then judge on reviews and how they answer questions.
Should I check the carrier as well as the broker? Yes. Ask which carrier is assigned and look up their safety record and cargo insurance before the vehicle loads.
Get a Quote
Call Ship A Car, Inc. at (866) 821-4555 and ask for our USDOT and MC numbers before you book anything, or price your move with the instant calculator.
