MC Number vs DOT Number

What is a DOT number?

The USDOT number is the safety identifier that follows a motor carrier from their first registration to the day they shut down. Once issued, it is permanent — it does not expire, you cannot renew it, and you cannot transfer it to another entity. FMCSA uses it to compile every roadside inspection, crash report, audit finding, and out-of-service order under the Compliance, Safety, Accountability program.

A USDOT is required of any motor carrier (interstate or intrastate hazmat) operating a commercial motor vehicle as defined in 49 CFR §390.5T — basically anything 10,001 lbs gross vehicle weight or higher carrying property or 9+ passengers in interstate commerce. 38 states plus Puerto Rico require a USDOT number for some intrastate operations (FMCSA list).

The USDOT itself is free. There is no application fee, no annual fee, and no renewal — though you do owe a biennial MCS-150 update under 49 CFR §390.19T (see our MCS-150 late filing guide for what happens when you miss it).

What is an MC number?

The MC number is operating authority. It is the legal permission — granted by FMCSA under the Interstate Commerce Commission Termination Act of 1995 (codified at 49 USC subchapter II) — to transport regulated property, household goods, or passengers for compensation across state lines. Without an MC number, a for-hire interstate carrier cannot legally pick up a load.

There are five flavors of operating authority:

• MC (Motor Carrier of Property): regulated general freight
• MC (Motor Carrier of Household Goods): moving company, regulated under 49 CFR Part 375
• MC-B (Broker): arranges loads but does not haul; requires BMC-84/85 surety bond
• MC-FF (Freight Forwarder): consolidates and distributes freight
• MC-PASS (Passenger Carrier): charter buses, vans 9+ passengers

Each docket type costs $300 paid directly to the US Treasury through Pay.gov. Combined motor-carrier-of-property + broker authority therefore costs $600 because that is two separate dockets. After submission, FMCSA publishes the application in the FMCSA Register with a 10-day protest window (49 CFR §365.203T). FMCSA controls the timing: authority is granted once the BOC-3 and insurance are on file and that protest period has passed.

You can file the OP-1 yourself on Pay.gov — nothing in 49 CFR requires a third party.

Who needs a DOT number, an MC number, or both?

Cross-reference your operation against this matrix:

• Private intrastate carrier (own goods, in-state only): No federal requirement, but 38 states plus Puerto Rico require a USDOT for some intrastate operations. No MC ever.
• Private interstate carrier (own goods, multi-state): USDOT required. No MC because you are not for-hire.
• For-hire intrastate carrier: Most states require a USDOT and a state-level intrastate operating authority (e.g., California MCP, Texas TxDMV). No federal MC.
• For-hire interstate carrier (most owner-operators): USDOT + MC, period.
• Freight broker (no truck): USDOT + MC-B + BMC-84 surety bond.
• Hazmat hauler (any operation): USDOT + MC if for-hire interstate + Hazmat Safety Permit (HSP) for placardable loads.

Tip: if you find yourself wondering whether you need an MC, the answer is almost always yes for any operation that gets paid to move someone else’s cargo across a state line.

How do the USDOT and MC numbers compare?

How do I check MC authority status?

Since May 14, 2026, FMCSA registration runs in Motus. Authority and BOC-3 status are checked in FMCSA’s Motus public search by USDOT number or company name at motus.dot.gov. What to look for:

• Operating authority: active means the MC is live. FMCSA grants authority once the BOC-3 and insurance are on file and the protest period has passed.
• BOC-3: on file or not. Authority is not granted without it.
• Insurance (BMC-91): on file, with its effective date.
• Revoked authority: if your authority has been revoked, you need a reinstatement — see fastreinstatementfiling.com or our reinstatement guide.

The SAFER company snapshot remains a general lookup for inspection and crash data.

Use our USDOT lookup tool for a clean readout of any FMCSA record.

What do people commonly confuse about MC and DOT numbers?

“Do I need an MC if I have a DOT?” If you cross state lines hauling someone else’s freight for money, yes. Otherwise, probably not.

“Can I haul before my MC is active?” No. Hauling for hire across state lines before FMCSA grants your authority can bring civil penalties under 49 USC §14901. Brokers will not load you and load boards will not show you to shippers.

“What is a CDL number? Do I need that too?” The CDL is a driver license, not a carrier identifier. The CDL is what allows the operator to hold the wheel; the USDOT and MC are what allow the company to operate the truck. They are issued by different agencies.

How long do USDOT and MC numbers last?

A USDOT number, once assigned, is permanent. It does not expire. You can ask FMCSA to inactivate it by filing an MCS-150 when you stop operating, but the number and its safety history stay attached to the entity that received it — USDOT numbers are not transferable (FMCSA). If you sell your trucking company to a different legal entity, the buyer generally needs its own USDOT number: FMCSA assigns each number to one person and does not transfer it.

An MC number, by contrast, has an active lifecycle: it issues, is granted once the BOC-3 filing + insurance are on file and the 10-day protest window has passed (FMCSA controls the timing), then runs continuously until the carrier voluntarily surrenders it (Form OCE-46) or FMCSA revokes it for cause. Common revocation triggers include an insurance lapse and an Unsatisfactory safety rating. A missed MCS-150 update is different: it can lead to civil penalties and deactivation of the USDOT number (49 CFR 390.19T(b)(4)), which is reactivated by filing the update. MC reinstatement after revocation is $300 through our service, with the $80 FMCSA fee included — see our authority reinstatement guide.

Do states have their own equivalent to the MC number?

For purely intrastate operations, several states issue their own analog to the MC number. Examples:

• California: CA Number from the California Highway Patrol, plus a Motor Carrier Permit (MCP) from the California DMV. Both required for any intrastate for-hire operation.
• Texas: Texas DMV Motor Carrier Registration. The TxDMV number is required for intrastate carriers; for-hire interstate carriers use the federal MC.
• Florida: Florida intrastate carriers register with FDOT; no separate state authority number, but a Florida Highway Patrol UCR equivalent applies.
• New York: NY Department of Transportation Section 99-T authority for intrastate movement of HHG and certain commodities.

Carriers with both interstate and intrastate operations stack the federal MC with the state-level equivalent. Roadside enforcement checks both. Run our state permit calculator to see which state-level identifiers stack on top of your federal authority.