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MC number

The FMCSA operating authority that lets a carrier haul regulated freight for hire across state lines.

Also called: Motor carrier number, Operating authority, MC docket number

Quick answer

What is MC number?

An MC number is the motor carrier operating authority FMCSA issues to companies hauling regulated commodities for hire in interstate commerce. It is separate from a USDOT number: the DOT number identifies the company, while the MC number grants the legal right to operate for hire.

Last verified by ELD Hub.

MC number vs USDOT number

A USDOT number is an identifier — it tracks your safety record, inspections, and crashes. An MC number is a permission — it authorizes you to transport regulated commodities for hire across state lines. Many carriers need both. A private carrier hauling only its own goods generally needs a DOT number but not an MC number.

Who needs one

You need operating authority if you are paid to transport federally regulated commodities in interstate commerce, or if you arrange that transportation as a broker or freight forwarder. Purely intrastate carriers and private carriers moving their own property typically do not.

What it takes to activate

Applying through FMCSA's Unified Registration System involves a one-time application fee, a BOC-3 process-agent filing, and proof of insurance filed by your insurer. Authority is not active until the insurance and BOC-3 are both on file, and there is a mandatory public vetting period after the application is granted.

  • URS application with a one-time fee
  • BOC-3 blanket process-agent filing, submitted by a process agent
  • Insurance filing (BMC-91X) submitted by your insurance carrier
  • Approximately 3 to 4 weeks from application to active authority

Keeping it active

Authority lapses if your insurance filing drops. Beyond that, you must keep the biennial MCS-150 update current, maintain UCR registration, and pass the New Entrant Safety Audit within your first year of operation.

Example

A new owner-operator applies for authority in early January, files BOC-3 the same week, and has the insurance agent submit the BMC-91X. The MC number activates in early February, and the New Entrant Safety Audit is scheduled within the first year.

Why it matters for a small fleet

Brokers verify authority status before tendering a load. An inactive MC — usually caused by a lapsed insurance filing — means you cannot legally be paid to move freight, even if your truck and driver are ready.

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FAQ

Common questions

How much does an MC number cost?

FMCSA charges a one-time application fee for operating authority. The larger real costs are the insurance the filing requires and the BOC-3 process-agent service, which is a modest one-time charge.

How long does it take to get an MC number?

Typically about three to four weeks, assuming the BOC-3 and insurance filings are submitted promptly. The authority is not usable until both are on file and the vetting period completes.

Do I need an MC number for intrastate trucking?

Generally no. Federal operating authority applies to interstate for-hire transportation of regulated commodities. Intrastate carriers follow their own state's authority and registration requirements.

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