MC number vs USDOT number
A USDOT number identifies a company with FMCSA for safety oversight, while an MC number is the docket number for operating authority that for-hire interstate carriers, brokers and freight forwarders need; many carriers need both.
What is MC number vs USDOT number?
The USDOT number is FMCSA’s identifier for every regulated entity. Interstate operators of a commercial motor vehicle need one. For property carriers that means a vehicle with a gross vehicle weight rating, gross combination weight rating or actual weight of 10,001 lb or more, or any vehicle hauling placardable hazmat (49 CFR 390.5). Some states also require a USDOT number for intrastate trucks. Registration must be updated every two years on Form MCS-150.
The MC number (MC-xxxxxx, or FF- for freight forwarders) is issued with operating authority. It is required for for-hire carriers of regulated commodities in interstate commerce, for property brokers and for freight forwarders. A private carrier hauling its own goods, or a carrier hauling only exempt commodities, needs a USDOT number but no MC number.
Are MC numbers being eliminated in 2026?
Not yet. Many articles claim MC numbers were retired on October 1, 2025. That did not happen. FMCSA is moving registration to its new system, Motus, and its Federal Register notice of April 29, 2026 says the second release of Motus will not include "the elimination of MC/FF numbers", nor changes to the BOC-3 filing process; those are left to later releases. FMCSA has said eliminating MC numbers would first go through a proposed rulemaking, and as of September 2026 no such proposal has been published.
Motus does show USDOT number suffixes per registration type, but FMCSA describes them as visible in the system for ease of use only. They are not required on the truck. In practice: keep your MC number on rate confirmations, broker-carrier agreements and invoices, and watch the Federal Register for a formal proposal.
Frequently asked questions
Do I need both an MC number and a USDOT number?
A for-hire carrier hauling regulated freight across state lines needs both: the USDOT number for safety registration and the MC number for operating authority. A private carrier or an exempt-commodity carrier needs only the USDOT number. A broker that does not operate trucks needs broker authority (an MC number) and a USDOT number.
What insurance do you need for operating authority?
A for-hire interstate property carrier with vehicles of 10,001 lb or more must carry at least US$750,000 in public liability coverage for general freight, US$1,000,000 for oil and general hazmat, and US$5,000,000 for certain high-hazard loads (49 CFR 387.9). Brokers and freight forwarders need a US$75,000 surety bond or trust fund, and since January 16, 2026 their registration is suspended immediately if it drops below that amount.
Will my MC number be replaced by my USDOT number?
Possibly in the future, but not today. FMCSA has signaled that MC numbers may eventually be phased out in favor of the USDOT number, but it has not published the required rulemaking. Until it does, MC numbers remain in use and are still issued.
How often do I have to update my USDOT registration?
Every two years, by filing an updated MCS-150 on a schedule set by the last digits of your USDOT number (49 CFR 390.19), and whenever your operation changes. Keep it current: brokers and shippers check the registration before they tender freight.
See MC number vs USDOT number in a real TMS
Transportial puts these concepts to work in one operational platform — planning, tracking, documents, and finance.