Every interstate carrier has a USDOT number, and everything filed under it (authority status, safety rating, inspection history, insurance on file) is public. Looking it up takes seconds. Knowing what the results mean is the useful part, and that's what this article covers.
If you'd rather skip the tabs and just see it all in one place, run the number through our free lookup. It pulls the same federal data and lays it out in plain English.
What is a USDOT number?
It's the federal ID for a motor carrier, the number FMCSA uses to track a company's safety record, inspections, crashes, and filings. It's painted on the door of every truck for a reason: it's how roadside inspectors, brokers, shippers, and insurance companies all identify the same operation. An MC number is related but different. That's the operating authority (the legal permission to haul for-hire freight), and one carrier can hold a DOT number before authority is ever granted.
How do you look one up?
Grab the number off the truck door, a rate confirmation, or just search the company name. The federal sources are FMCSA's SAFER system for the company snapshot and its licensing/insurance system for authority and filings, or use our free DOT / MC lookup, which pulls the records together in one search and works from a phone in a truck stop parking lot.
The lookup is the easy step. Here's how to read what comes back.
Is the operating authority actually active?
The first thing to check. Authority status comes back as active, inactive, or none, and each one tells you something:
- Active: the carrier can legally haul for-hire freight. Green light, keep reading.
- Inactive / revoked: the authority existed and was pulled, most often because insurance lapsed and the carrier's filing was cancelled. A carrier hauling on revoked authority is running illegally, and any broker who loads them is taking on that liability.
- No authority: a DOT number with no MC authority is fine for private carriers hauling their own goods, but a "carrier" offering to haul your freight without authority is a problem.
Here's the insider note: authority that flickers (active, revoked, reinstated, revoked again) is almost always an insurance-payment problem. It's one of the strongest signals in the whole file, and it's invisible unless you look.
What does the safety rating mean?
FMCSA assigns a rating only after a compliance review, so most small carriers show not rated. That's normal, not a red flag. When there is a rating:
- Satisfactory: passed a review. The best you can have.
- Conditional: the review found compliance problems the carrier hasn't fixed. Still legal to operate, but many brokers and shippers won't touch a Conditional carrier, and insurance pricing gets ugly.
- Unsatisfactory: out of business, effectively. An Unsatisfactory rating comes with an order to cease interstate operations.
If you're a carrier, know your own rating before your customers look it up, because they do.
What do out-of-service rates tell you?
Every roadside inspection ends with the truck either continuing on or being placed out of service for a violation serious enough to park it. The lookup shows a carrier's OOS percentage for vehicles and drivers, next to the national averages (roughly 22% vehicle and 6-7% driver, year to year).
Read it like an underwriter: a carrier at double the national vehicle OOS rate has trucks that fail inspections at twice the normal clip. That's maintenance culture showing up in federal data. One bad inspection on a small fleet can skew the math, so check the inspection count too. Two inspections is noise; forty is a pattern. Want the numbers without hunting through tables? Run the carrier here.
What else is in the file?
- Fleet size and drivers: power units and driver counts, straight from the carrier's own MCS-150 filing. Useful for sniffing out mismatches, like a "fleet" of 40 trucks with 2 drivers, or a rate con from a company whose file shows one truck. Stale filings show up here too: the MCS-150 must be updated every two years, and a carrier that hasn't bothered tells you something.
- Insurance on file: for-hire authority requires liability insurance filed directly with FMCSA, so the record shows the insurer, the filing, and its history. You can see whether coverage is on file right now and whether there's a pending cancellation. For what those liability requirements actually mean, see Primary liability, explained like a human.
- Crash history: DOT-recordable crashes over the past 24 months. Recordable doesn't mean at-fault, so read counts against fleet size, not as a verdict.
Who should be running these lookups?
Everyone in the chain, honestly. Brokers and shippers vet carriers before tendering freight. Drivers check a carrier before leasing on. An operation with flickering authority and a sky-high OOS rate is telling you how they'll handle your settlements too. Carriers should run their own number monthly, because this is exactly what your customers and your insurance underwriter see. And owner-operators buying a truck can check whether the seller's operation ran it hard.
It's free, it's public, and it takes thirty seconds. Run a number now.
How McClure helps
We read these files every day. It's part of how we quote, because your safety data is exactly what insurance underwriters price from. Our free lookup puts the same federal records in front of you in plain English, and if your own number shows something that's hurting you (a Conditional rating, an ugly OOS rate, a stale MCS-150), we'll tell you what it's costing you on premium and what fixing it looks like.