How to look up a DOT number

A USDOT number is the identifier the Federal Motor Carrier Safety Administration assigns to a motor carrier when it registers. Every company that operates commercial motor vehicles in interstate commerce has to have one, and most states require one for intrastate operation as well. It is the key that every federal record about the carrier is filed under: the census entry, the insurance filings, the inspections, the crashes.

"Looking one up" means one of two things. Either you have a name and want the number, or you have the number and want the record behind it. This guide covers both, and the case where the number you cannot find is your own.

#If you have the company name

Search SAFER. FMCSA's public system at safer.fmcsa.dot.gov has a Company Snapshot search that accepts a name. It matches the legal name as registered, from its first characters, so what you type has to be what is on file. The industry runs on brands and DBAs and the register runs on legal entities, which is where most failed searches come from: "ABC Express" on the door can be "ABC Xpress Logistics LLC" on file, or the owner's own name.

A few things that help:

• Try the first distinctive word rather than the whole name. A search for "Schneider" finds the entity; a search for "Schneider Trucking" may not, if the legal name is "Schneider National Carriers".
• Expect several matches. Common names produce a list. Use the city, the state and the fleet size to pick the right one, and be suspicious of a match in the wrong state.
• Check the DBA. The snapshot shows both the legal name and the DBA name, so a match under a legal name you did not expect can still be the company you mean.

Or search the census by any part of the name. The free DOT number lookup on this site searches the same FMCSA carrier universe, matches anywhere in the legal or DBA name rather than from the start, and sorts the biggest fleets first. Each match shows the USDOT number, the MC docket, the home state, the fleet size and whether insurance is on file. It is the faster route when all you have is what was painted on the truck.

#If you have the truck in front of you

You do not need a search at all. Federal marking rules (49 CFR 390.21) require every self-propelled commercial motor vehicle to display the carrier's legal or trade name and its USDOT number on both sides, in a contrasting colour, legible from fifty feet in daylight while the vehicle is stationary. In practice it is on the cab doors, under the company name, in the form "USDOT 1234567".

Two things to know when reading a door:

• A leased truck shows the number of the carrier it is leased to. An owner-operator running under someone else's authority marks the truck with that carrier's name and USDOT number, because that carrier is the one responsible for it. The name on the door and the name on the title can be different companies, legitimately.
• Trailers do not carry it. The marking rule applies to the power unit. A trailer's own identification is its VIN, on a plate at the front.

Photograph the door, then jump to the section on looking up the record below.

#If you have an MC number instead

An MC number is not a USDOT number. It is the docket a for-hire carrier's operating authority is filed under, and a company can hold more than one. Every docket maps to exactly one USDOT number, though, so the MC number gets you there in one step: SAFER's snapshot search accepts MC and MX numbers, and the MC number lookup resolves the docket to the USDOT and returns the authority and insurance record with it.

If you are not sure which of the two numbers you have, the USDOT number is up to eight digits with no prefix, and the MC number is usually written with one ("MC-133655").

#If you have paperwork

The number turns up on most of the documents a carrier produces:

• The MCS-150. The registration form every carrier files and must update at least every two years. The USDOT number is printed on it.
• The UCR registration. Unified Carrier Registration is filed against the USDOT number.
• The insurance filing. The evidence-of-coverage forms an insurer files with FMCSA (the BMC-91 and its relatives) identify the carrier by USDOT number and docket. If you are holding a certificate of insurance rather than the filing itself, the number is sometimes typed into the description of operations and sometimes not.
• A carrier packet or a load confirmation. Brokers and shippers ask for the USDOT and MC numbers on every packet, so if the carrier has hauled for anyone, it has written them down.

#If you have the number and want the record

The number is the easy part. What you probably want is one of four records, and they live in different places.

The public carrier directory on this site puts the first three on one page for any active, insured USDOT number.

#Looking up your own DOT number

If the number you cannot find is your own, it was assigned the moment you registered, and it is in four places: on the confirmation FMCSA issued when you registered, on the MCS-150 you filed, on the side of your truck if you have marked it, and in SAFER under your legal name. Search SAFER by the exact legal name you registered under, not the brand you trade as.

If a registration service or a compliance agent set the company up for you, they have it.

If you have never registered, you do not have one yet. Registration is through FMCSA's own system and there is no other way to obtain a number; anyone offering to "look up" or "issue" a USDOT number for a fee that FMCSA does not charge is selling you a form.

#How to check whether a DOT number is active

"Active" means three different things on the federal record, and a number can be active in one sense and dead in another.

• USDOT status. Active or Inactive, shown on the SAFER snapshot. The usual reason for Inactive is a missed biennial update: FMCSA deactivates numbers whose MCS-150 has not been updated on schedule, and filing the update brings the number back.
• Operating authority status. Active, Inactive or None, shown in FMCSA's registration record (MOTUS since May 2026; the older Licensing and Insurance pages are no longer updated). A private carrier that hauls only its own goods has an active USDOT number and no authority at all, which is normal. A for-hire carrier whose authority reads Inactive has usually lost it to an insurance lapse: when the insurer files a cancellation and nothing replaces it, the authority is revoked after the effective date.
• Out-of-service orders. A third state, separate from both. A carrier under an out-of-service order may not operate at all, whatever its USDOT and authority status say.

The company snapshot shows the first, the USDOT insurance lookup the second, and the free underwriter view checks all three at once and says which one fired.

#What the number does and does not tell you

A USDOT number identifies. It is not a licence, not a safety endorsement and not proof of insurance. A carrier with an active number can be uninsured, unrated, or barred from operating, and each of those is a separate record.

Two properties of the number are worth remembering. It stays with the legal entity: a new name, a move or new owners of the same company keep the same number, but a new legal entity needs its own, which includes most sales of a business and a sole proprietor forming an LLC. And it belongs to the entity, not the people behind it: a new company formed by the same owners gets a new number with a clean history, which is the mechanism a chameleon carrier uses to shed a bad record. The chameleon carriers guide covers the public signals that expose it.

#Related

• How to verify a motor carrier's insurance
• BI/PD filings, explained
• Chameleon carriers: spotting a reincarnated motor carrier