Freight & Logistics Terminology

Motor Carrier Number

Category: Safety & Legal Regulatory • Fleet Management • Authority Tracking
A Motor Carrier Number (MC Number) is a unique operational registration code issued by the Federal Motor Carrier Safety Administration (FMCSA) to for-hire interstate transportation companies and freight brokers. It grants legal Operating Authority to transport regulated freight, passengers, or motor vehicles across state lines for commercial compensation.

Three Pillars of the Motor Carrier Number

1. Legal For-Hire Operating Authority

Establishes legal entitlement under federal law to accept payment for transporting cargo, passenger loads, or vehicles across state borders.

2. Insurance & Surety Bond Tracking

Links directly to mandatory federal insurance filings, including public liability (BMC-91) and freight broker surety bonds ($75,000 BMC-84).

3. Identity & Fraud Prevention Benchmark

Serves as the primary public verification ID used by load boards, shippers, and brokers to confirm active status and prevent double-brokering scams.

Key Features & Operating Authority Designations

The FMCSA issues distinct MC Number prefixes and operating authority classifications based on corporate business models:

  • Motor Carrier of Property (Except Household Goods): Standard authority for commercial auto haulers, flatbed fleets, and general freight carriers.
  • Broker of Property (Except Household Goods): Operating authority granted to freight and auto transport brokers to arrange transport without operating power units.
  • Public Safety & SAFER Integration: Directly searchable in the FMCSA SAFER database to verify active authority, safety ratings, and inspection logs.
  • Designated Process Agent Filing (BOC-3): Requires an active Form BOC-3 on file, establishing legal process agents in every state of operation.
  • Mandatory Legal Stenciling: Commercial trucks operating under active MC authority must display their USDOT and MC numbers legibly on power units.
  • 21-Day Protest Period: Mandatory public notification window following initial application before permanent active authority is granted.

Comparison: USDOT Number vs. Motor Carrier (MC) Number

Regulatory Attribute USDOT Number Motor Carrier (MC) Number
Primary Purpose Tracks safety metrics, roadside inspections, and crash data across all commercial vehicles. Grants legal permission to operate as a "for-hire" carrier or broker crossing state lines.
Who Needs It? All commercial vehicles exceeding GVWR thresholds or carrying hazardous cargo (Intrastate & Interstate). Interstate "For-Hire" carriers, auto haulers, passenger transporters, and freight brokers only.
Financial Requirements Focuses on safety tracking; no separate broker bond required. Requires mandatory active public liability insurance or a $75,000 broker bond on file.
Issuance Cost / Authority Fee Issued free upon filing the initial MCS-150 registration. Requires a federal operating authority filing fee ($300 per category).

How a Carrier Obtains and Activates an MC Number

  1. 1
    Application Submission (OP-1 Form): The company registers with the Unified Registration System (URS) and files for operating authority, generating a provisional MC number.
  2. 2
    Insurance & BOC-3 Filing: Within 20 days, the applicant's insurance provider files Form BMC-91/91X and a process agent files Form BOC-3 with the FMCSA.
  3. 3
    Public Vetting & Protest Window: The application is published in the FMCSA Register for a mandatory 10-to-21-day public review period.
  4. 4
    Certificate Issuance & Active Status: Upon satisfying all financial and safety requirements, the FMCSA issues the official Certificate of Authority, marking the MC Number as "Authorized."

Logistics Best Practice: Verifying MC Numbers on Central Dispatch

Before dispatching a car hauler or accepting a quote from an auto transport broker, always verify their Motor Carrier (MC) Number using the official FMCSA SAFER database (Company Snapshot). Check that their operating status is explicitly marked as "AUTHORIZED FOR PROPERTY" and that their public liability insurance policy is active. Never do business with a carrier whose MC authority status is listed as "INACTIVE," "REVOKED," or "PENDING REGISTRATION."