DOT Number Guide: USDOT Registration for New Carriers

The USDOT number is the foundation of your carrier identity with the federal government. It connects your safety record, inspection history, and operating information to a single identifier that follows your business.

This guide covers what the number is, who needs it, and how to register. If you’re still sorting out federal registration basics, start with the difference between a DOT number and MC number.

What the USDOT Number Tracks

Every commercial motor vehicle in interstate commerce that meets FMCSA thresholds operates under a USDOT number. The number links to your:

• Safety rating — Satisfactory, Conditional, or Unsatisfactory
• Inspection history — Every roadside inspection is recorded
• Crash data — DOT-reportable crashes appear here
• Audit history — Safety audits and compliance reviews
• Insurance and authority status — Linked through the LMIA system when you also apply for MC operating authority
• MCS-150 registration data — Carrier name, address, commodity, equipment type

When a shipper, broker, or officer runs your USDOT number, all of this information is visible in public FMCSA systems. Brokers will use the same public data when reviewing your carrier packet.

Who Needs a USDOT Number

Federal requirements apply to carriers operating CMVs in interstate commerce that meet any of these thresholds:

• Vehicle with a GVWR or GCWR of 10,001 lbs or more
• Vehicle designed to transport 9–15 passengers for compensation
• Vehicle transporting hazardous materials requiring placards

Some states extend their own requirements to intrastate commercial vehicle operations. Check your state separately for intrastate rules.

How to Register

1. Go to the FMCSA portal Registration is at portal.fmcsa.dot.gov. You can start the process through the Unified Registration System (URS).

2. Create an account You’ll need an email address and some basic business information to set up an account.

3. Complete the MCS-150 form The MCS-150 is the Motor Carrier Identification Report. It collects:

• Legal business name and DBA (if applicable)
• Principal place of business address
• Mailing address
• EIN
• Number of power units and drivers
• Type of operation (private, for-hire, exempt, hazmat)
• Types of commodities hauled
• Type of cargo body

4. Submit After submission, you’ll receive your USDOT number. For most applicants, this happens immediately or within a short processing window.

5. No federal fee There is no FMCSA fee for obtaining a USDOT number. State agencies may charge separate fees for their own processes.

The USDOT Number on Your Vehicle

Federal regulations require your USDOT number to be displayed on each CMV that operates in interstate commerce. Display requirements include:

• On both sides of the power unit (cab)
• Minimum 2-inch contrasting lettering
• Your legal business name and USDOT number

Exact format requirements are specified in 49 CFR Part 390.21. Verify current requirements before lettering your cab.

MCS-150 Biennial Update

After you register, you’re required to update your MCS-150 every two years. If you don’t update on time, the FMCSA may deactivate your USDOT number; add this to your first renewal and filings calendar from day one.

The update is triggered by the month and year of your original registration. Track this date — it won’t come with a reminder. Set a calendar alert.

You must also update your MCS-150 if:

• Your business name changes
• Your address changes
• You significantly change your operation (new commodity types, change in fleet size)

Checking Your USDOT Status

Your USDOT number and carrier profile are publicly visible in the FMCSA SAFER system at safer.fmcsa.dot.gov. Any shipper, broker, or compliance officer can search your number and see your carrier profile.

Check your own listing periodically to confirm:

• Business information is accurate and current
• Safety rating shows correctly
• No unexpected flags or orders

USDOT vs. State DOT Numbers

Some states have their own DOT registration programs for intrastate commercial vehicle operations. These are separate from the FMCSA USDOT number and operate under different requirements.

If you operate exclusively within one state, check that state’s motor carrier or commercial vehicle requirements directly. Operating interstate requires the federal USDOT number.

When to Verify with Official Sources

FMCSA registration procedures and display requirements are codified in federal regulations. Always verify current requirements at:

• FMCSA registration portal: portal.fmcsa.dot.gov
• MCS-150 form and instructions: FMCSA.dot.gov/registration
• Vehicle marking requirements: 49 CFR Part 390.21

Frequently Asked Questions

How do I get a DOT number?

Register online through the FMCSA portal at portal.fmcsa.dot.gov. You'll complete an MCS-150 form and receive your USDOT number after submission. There is no federal fee.

Do I need a DOT number to drive locally?

Federal USDOT numbers apply to interstate commerce. Some states require state DOT numbers for intrastate operations. Check your state's commercial vehicle requirements separately.

What is the biennial MCS-150 update?

Carriers must update their MCS-150 registration with the FMCSA every two years. Failure to update can result in the USDOT number being deactivated.