DOT Number Lookup
Free USDOT number search with safety record, insurance verification, and trust score — backed by live FMCSA data. Used by brokers, dispatchers, and shippers vetting motor carriers every day.
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What is a USDOT number?
A USDOT number is a unique identifier the US Department of Transportation assigns to every commercial motor carrier that operates interstate, transports hazardous materials, or carries 8+ passengers. The number tracks the carrier's complete operational history: safety inspections, crash records, insurance filings, operating authority status, and compliance reviews.
Every motor carrier displays its USDOT number prominently on the side of its trucks, on freight invoices, and on rate confirmations. The number is your starting point for verifying that a carrier is legitimate, properly insured, and authorized to haul your load.
USDOT vs DOT: same number
You'll see both USDOT and DOT used to refer to the same number. USDOT stands for "United States Department of Transportation" and is the formal prefix — what you'll see on the actual FMCSA registration documents. DOT number is the everyday shorthand. They refer to the same number; you can use either when searching.
How USDOT numbers are issued
Carriers register through FMCSA (Federal Motor Carrier Safety Administration), a sub-agency of the US Department of Transportation. Registration is free for the USDOT number itself; the FMCSA assigns the number once the carrier completes the MCS-150 application. Numbers are issued sequentially and are permanent — if a carrier goes out of business and returns, FMCSA may issue a new USDOT, which is itself a flag we monitor for chameleon carrier patterns.
How to check a DOT number
Looking up a DOT number takes about 30 seconds. Here's the four-step process we recommend:
Find the DOT number
Look on the carrier's truck door, freight invoice, BOL, rate confirmation, or insurance certificate. The format is USDOT 1234567 or DOT 1234567 — usually 5 to 8 digits.
Enter it into the search bar
On mclookup.com, type just the digits — no need for the USDOT prefix or punctuation. Hit search.
Review the carrier profile
You'll see the carrier's legal name, DBA, MC number, fleet size, address, operating authority status, and a 0–100 trust score with an APPROVE / REVIEW / REJECT verdict.
Check authority + insurance
Confirm operating authority is Active. Verify insurance is in effect with limits adequate for your load. Watch for any chameleon flags or high crash rates relative to fleet size.
Don't have the DOT number? You can also search by company legal name or MC number on MC Look Up — we'll resolve any of the three to the same underlying carrier record. Try the MC number lookup guide if you have an MC instead.
What DOT number statuses mean
The most important thing to check on any DOT lookup is the operating authority status. There are five common values:
Active — Authorized to operate
The carrier has current operating authority granted by FMCSA, has filed required insurance, and is permitted to haul interstate freight. This is the only status under which a carrier should be hired.
Inactive — Authority not currently in effect
The carrier filed registration but has not maintained active operating authority — usually because of expired insurance, missed biennial updates (MCS-150), or voluntary suspension. They cannot legally operate until reinstated.
Revoked — Authority cancelled by FMCSA
FMCSA has formally revoked the carrier's authority, typically due to safety violations, unpaid penalties, or fraud. This is the most serious status and a near-automatic REJECT in our scoring.
Out-of-Service — Prohibited from operating
The carrier (or specific vehicles/drivers) has been ordered out of service by federal or state inspectors due to imminent safety hazards. Operating while OOS is a federal crime.
Pending — Application in process
The carrier has applied for authority but FMCSA has not yet approved it. The carrier cannot operate yet. This status is normal for newly registered businesses but should clear within 21 days.
Why vet a DOT number before booking?
A DOT number alone tells you a carrier exists in the FMCSA database. It doesn't tell you whether they're safe, insured, or solvent. The difference between checking and vetting is the difference between confirming a phone number works and confirming the person on the other end is trustworthy.
Brokers and shippers typically vet for five risks:
- Cargo theft and fraud. Chameleon carriers (re-registered bad actors) and double brokers cost the industry billions per year. A clean-looking DOT can hide a revoked carrier's history.
- Insurance gaps. A carrier with expired or insufficient insurance leaves you holding the bag if a load is damaged or a third-party claim follows a crash.
- Safety record. Carriers with high out-of-service rates or fatal crash patterns put your freight — and your reputation — at risk.
- Authority status. Hiring a carrier with revoked or inactive authority can make you legally liable for the resulting violations.
- Compliance audits. Brokers operating under their own MC are required to vet carriers; documentation of due diligence is your defense if a deal goes sideways.
MC Look Up surfaces all five in a single carrier profile. You see the score, the verdict, the evidence, and you can act in seconds.
Want the full vetting checklist? The help center walks through the six-point pre-booking checklist used by senior dispatch and broker teams.
Frequently asked questions
How do I look up a DOT number for free?
MC Look Up offers free DOT number lookup with up to 50 searches per day on the free plan. The FMCSA SAFER website (safer.fmcsa.dot.gov) is also free but doesn't include scoring, chameleon detection, or insurance gap analysis — you'd have to cross-check across multiple FMCSA systems manually.
Where do I find a DOT number on a truck?
By federal regulation, the USDOT number must appear on both sides of the power unit (tractor) in contrasting color, at least 2 inches tall, and readable from 50 feet in daylight. Look for USDOT 1234567 or U.S. DOT 1234567 near the company name or door panel.
Can I check a DOT number anonymously?
Yes. MC Look Up doesn't notify the carrier when you look them up — searches are completely private. The carrier won't know you've vetted them.
How accurate is the DOT number data?
We pull live data from FMCSA Census, SMS BASICs, Inspections, Crashes, Insurance, Authority History, L&I records, and QCMobile — the same authoritative federal sources FMCSA itself publishes. Data is refreshed at most every 360 hours; re-search any carrier to force a fresh pull.
What if a DOT number returns no results?
Either the number is invalid (typo or fictitious), the carrier was deregistered before our records start, or it's an intrastate-only carrier registered under a state-only program. Try double-checking the digits, searching by legal name instead, or cross-checking the FMCSA SAFER site directly.
Is there a difference between a DOT number and an MC number?
Yes. A DOT number identifies the carrier as a registered commercial vehicle operator. An MC number (Motor Carrier number) authorizes the carrier to transport regulated goods across state lines for hire. Most for-hire carriers have both. See the MC number lookup guide for details.
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