Missouri DOT Number Requirements: USDOT Plus MO for Intrastate Carriers

Missouri DOT number requirements add one detail to the federal marking: the letters MO. Under 7 CSR 265-10.025, a carrier that is engaged in intrastate operations only, as authorized by the state commission, includes MO immediately after its USDOT number. The number itself still comes from FMCSA. This guide walks through what the rule says, who it names, and what to ask Missouri Department of Transportation (MoDOT) Motor Carrier Services before you letter a truck.

The rule in three short parts

Rule 025 is titled "Marking of Vehicles," and it has three subsections.

• Subsection (1) says every motor vehicle that a motor carrier operates in intrastate commerce under a property carrier registration, certificate or permit issued by the state must be marked as 49 CFR 390.21 requires. That is the federal baseline: your legal name or trade name and the USDOT number, on both sides, in colors that contrast sharply with the background, readable from 50 feet in daylight while the vehicle is stopped.
• Subsection (2) adds the Missouri piece. A carrier in intrastate operations only puts the letters MO immediately after the USDOT number.
• Subsection (3) covers a sale. If an intrastate carrier sells or otherwise transfers a vehicle, the seller first removes its required markings.

One detail worth knowing: subsection (1) points to the version of 390.21 that was published on August 14, 2019, and says the rule does not pick up later amendments. If you have a question about a recent federal change, ask MoDOT which text it applies.

What MoDOT's own guide adds

MoDOT Motor Carrier Services publishes a Missouri Trucking Guide (the 2025 edition is the one we read). Its intrastate section says every commercial motor vehicle operated for hire by a carrier only in intrastate commerce is marked on both sides, with the USDOT number followed by MO. It gives the example USDOT 654321 MO.

The guide goes further than the rule on two points. For-hire intrastate carriers also mark one side with the owner's name and the address the vehicle is operated from. A private carrier running only in intrastate commerce displays the owner's name, the operating address, and the word "local" on each local commercial vehicle. We read these in the guide, not in rule 025, so confirm the details for your type of operation.

Who the rule covers, and who might fall outside

Rule 025 is tied to a registration: a property carrier registration, certificate or permit. MoDOT's guide says intrastate carriers that transport property must hold a Property Carrier Registration, and it lists exemptions. Private carriers are on that list, along with farm and dairy products from the farm, freight in vehicles licensed at 6,000 pounds or less, and tow trucks used exclusively for towing. The guide says its list covers the most common exemptions and points to Missouri Revised Statutes 390.030 for the rest.

The guide's definition of an intrastate commercial motor vehicle starts at a rating or actual weight of 26,001 pounds or more, with separate tests for passenger and hazardous-materials vehicles. Whether a given pickup, box truck or dump truck is covered depends on its weight, how it is used and how you are registered. That is a question for MoDOT, and the questions are below.

A worked example for the door

Take Little Piney Hauling LLC, a made-up gravel hauler that never leaves Missouri, with the made-up number 3456789. Its door would read:

• LITTLE PINEY HAULING LLC
• USDOT 3456789 MO

The name should match the one on the FMCSA registration. The MO sits right after the digits, in the same line, with nothing between. Stand 50 feet away with the truck parked and read the whole line, MO included. Our display rules page and the guide on where to put the USDOT number on a truck cover contrast and placement.

Slips to look for:

• MO placed before the number, or "Mo." with a period.
• "Missouri" spelled out in place of the two letters.
• MO set so small that the end of the line fades first.
• A truck sold with its lettering still on it, which subsection (3) says the seller removes.
• A name that has drifted from the registration. See USDOT number examples and mistakes.

Where the numbers come from

Two separate things sit behind a Missouri door.

The USDOT number. Rule 7 CSR 265-10.015 lists confirmation of a USDOT registration among the documents needed for an intrastate authority application. New numbers are requested in FMCSA's Motus system at motus.dot.gov. Our guide to getting a USDOT number covers the steps, and the free USDOT number checker helps if you are still asking whether you need one.

Missouri intrastate authority. This comes from MoDOT. The guide says applications are filed online in MoDOT Carrier Express at modot.org/mce, and that Motor Carrier Services takes calls at 1-866-831-6277. The guide also mentions an annual regulatory decal that MoDOT sells for the side of each unit. That is a state credential, not the same thing as the lettering described here, and we do not make it.

Questions to ask MoDOT Motor Carrier Services

Write down the date and the name of whoever answers.

1. Is my truck operating under a property carrier registration, certificate or permit that makes rule 025 apply?
2. Am I engaged in intrastate operations only, so that MO follows my number?
3. If I add interstate hauling later, what happens to the MO?
4. Does my weight or my type of use put the truck inside the commercial motor vehicle definition?
5. Do I also need the name-and-address or "local" markings your guide describes?

Ordering the MO decal

The USDOT Decal with MO Suffix prints USDOT, your number and MO on one line, from $18.99 per decal at 12 inches. You pick the width (12, 18 or 24 inches, which are decal widths and not legal sizes), the lettering color and the sticker color. A Set of 2 gives you one for each door.

If the truck also needs your name, the Company Name + USDOT Decal carries both on one rectangle. Preview either on a truck door in the door builder. We print what you type, and the carrier answers for the content and the registration. For other states, see USDOT number requirements by state.