USDOT Number on the Truck: Marking Rules Brokers Can Check

What the marking must show

Section 390.21T(b) requires the legal name or a single trade name of the carrier operating the vehicle, as listed on its MCS-150, and the USDOT number preceded by the letters “USDOT.” If any other person’s name appears on the vehicle, the operating carrier’s name and number must follow the words “operated by.” Other identifying information is allowed if it is not inconsistent.

The marking must appear on both sides of the vehicle, contrast sharply with the background and be readable in daylight from 50 feet while the vehicle is stationary. It may be painted or a removable device that meets the same standard. FMCSA notes that the suffixes Motus adds to newly issued USDOT numbers are not a vehicle marking requirement.

Sources: 49 CFR 390.21T: marking of self-propelled CMVs and intermodal equipment; FMCSA: Registration changes in Motus

Leased trucks show the carrier operating them

Under 49 CFR 376.11(c), an authorized carrier using leased equipment must identify it as in its own service under the part 390 marking rules for the period of the lease. Unless a copy of the lease is carried, the carrier keeps a statement with the equipment certifying that it operates it, naming the owner, the date and length of the lease, any commodity restrictions and where the original lease is kept.

An owner-operator’s truck leased to your contracted carrier should therefore carry the contracted carrier’s name and USDOT number, often after “operated by.” A truck showing only the owner-operator’s own USDOT number is either operating under its own authority or not properly marked, and the difference matters. Leasing equipment is lawful; using another company’s number is not, as the guide to related carriers with separate USDOT numbers explains.

Sources: 49 CFR 376.11: general leasing requirements, including identification of leased equipment; FMCSA: Do not sell, purchase or lease a USDOT or MC number (March 19, 2026)

Rentals of 30 days or less

Section 390.21T(e) allows a carrier renting a truck for 30 days or less to run it under the rental company’s name and USDOT number, if the rental agreement conspicuously states the renting carrier’s name, principal business address and USDOT number, includes a prescribed sentence about cooperating with law enforcement, and is carried on the vehicle for the full term.

A rental truck showing the rental company’s number is therefore not a mismatch on its own. Ask the driver for the rental agreement and check that it names the carrier you contracted. Trailers are not the test: the rule covers self-propelled vehicles, and intermodal equipment is marked by its provider.

Sources: 49 CFR 390.21T: marking of self-propelled CMVs and intermodal equipment

At the dock

FMCSA’s fraud guidance recommends recording tractor and trailer plates and comparing the arriving truck with the contracted carrier. Read the name and number on both doors, then compare them with the legal and DBA names on the carrier’s record; a single trade name is permitted, so a DBA on the door is not a discrepancy. The guide to verifying identity at pickup covers the rest of the handoff.

When the door shows a different carrier with no “operated by” line and no rental agreement, another company may be hauling the load. The guide to double brokering explains which arrangements can be legitimate and how to establish which one this is before accusing anyone.

Sources: FMCSA: Broker and carrier fraud and identity theft; 49 CFR 390.21T: marking of self-propelled CMVs and intermodal equipment

When the marking does not match

An illustrative note: “Door reads Carrier B, USDOT for B, ‘operated by’ Carrier A with A’s USDOT. Driver produced lease statement naming A as lessee. Matches contracted carrier; released.”

Recommended questions, in order, before releasing the freight under your brokerage’s policy:

• Does an “operated by” line name the contracted carrier and its USDOT number?
• If not, is the truck a short-term rental, and does the agreement on board name the contracted carrier?
• If neither, call the contracted carrier at the phone number on its FMCSA record and ask who is hauling.
• Record the plates, the marking as read and who resolved the difference.

Sources: FMCSA: Broker and carrier fraud and identity theft