Trucking dictionary

USDOT number

USDOT number: A USDOT number is the unique identifier FMCSA assigns to companies that operate commercial vehicles. It's used to track a company's safety record, inspections, crashes and audits. Interstate commercial vehicles of 10,001 lb or more need one, as do placarded hazmat and certain passenger vehicles, and many states require one for in-state trucks too.

Who needs one

FMCSA requires a USDOT number for companies that operate vehicles in interstate commerce that are rated or weigh 10,001 lb or more (GVWR or GCWR), carry hazardous materials in quantities that require placards, or carry certain numbers of passengers. Many states also require a USDOT number for commercial vehicles that never leave the state; FMCSA lists them.

Source: FMCSA, Do I need a USDOT number? · checked 2026-10

Do these trucks need a USDOT number?

26 ft box truck, interstate for-hire: Yes (over 10,000 lb)
Hotshot pickup + trailer, interstate: Yes if GCWR is 10,001+ lb
Tractor-trailer, interstate: Yes
Dump truck, one state only: Depends on the state
Any truck with placarded hazmat: Yes

Ratings on the door and trailer stickers decide it. Check your state's rules for in-state work.

Keeping it active

Biennial update. Every company with a USDOT number must update its registration (MCS-150 or the URS form) every 24 months. The month comes from the last digit of the number and the year from the next-to-last digit (49 CFR 390.19T, 390.201(d)). Missing it can deactivate the number. The new authority checklist has a date calculator.
New entrant period. New interstate carriers are monitored for 18 months, with a safety audit; see the new entrant audit guide.
Markings. Interstate commercial vehicles display the company name and USDOT number on both sides.

Is a USDOT number the same as an MC number?

No. The USDOT number identifies your company. The MC number identifies operating authority, which for-hire interstate carriers of regulated freight generally need in addition.

What does GVWR have to do with it?

The 10,001 lb line is based on the vehicle's weight rating or actual weight, whichever is higher. See GVWR.

Steve Woods · Lead Dispatcher, TruckSprint

Steve Woods leads the TruckSprint dispatch desk and reviews every guide we publish. How we research and update guides.

Updated October 2026