Motor Carrier Number
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🔖 This article is part of the Customs Glossary Guide |
MC Number (Operating Authority) Explained
The federal license required for for-hire carriers to transport regulated commodities across state lines.
What is an MC Number?
An MC Number (Motor Carrier Number) serves as a carrier's "Interstate Operating Authority." Unlike a USDOT Number, which tracks safety scores, the MC Number is effectively a business license issued by the Federal Motor Carrier Safety Administration (FMCSA) that grants legal permission to haul freight for money across state lines.
Most cross-border carriers need an MC Number because crossing the international border (e.g., Canada to US) is considered a form of Interstate Commerce by the US government.
Who Needs It?
You generally need an MC Number if you meet both of these criteria:
1. For-Hire: You are paid to transport goods owned by someone else (not your own company's property). 2. Regulated Commodities: You haul standard freight (e.g., auto parts, electronics, food) rather than "exempt" commodities (e.g., unprocessed grain).
MC Number vs. DOT Number
Carriers often confuse these two identifiers. You typically need both to operate legally.
| Feature | USDOT Number | MC Number |
|---|---|---|
| Purpose | Safety ID. Used to track audits, crash investigations, and inspections. | Business License. Grants permission to engage in commercial trucking (Economic Authority). |
| Who Needs It? | Almost every commercial vehicle over 10,001 lbs. | Only "For-Hire" carriers moving regulated freight across state/border lines. |
| Cost | Free. | $300 per authority type. |
| Wait Time | Instant issuance. | 21-25 days (Vetting & Protest Period). |
How to Get Your Authority
Obtaining an active MC Number is a multi-step process that cannot be rushed. New carriers should plan for a 3-4 week lead time before they can start hauling.
1. Apply via URS
Applications are submitted through the FMCSA's Unified Registration System (URS). You will pay a non-refundable fee of $300 USD.
2. The "Protest Period"
Once you apply, your MC Number is issued but placed in "Pending" status. It is published in the FMCSA Register for 10 business days to allow anyone to protest your authority (rare, but legally required).
3. Insurance & BOC-3
Before the authority becomes "Active," you must complete two critical filings:
- BOC-3 (Process Agents): Designates a legal representative in every state you operate in (usually handled by a blanket coverage agency).
- Insurance (BMC-91X): Your insurance provider must electronically file proof of Liability Insurance (typically $750,000 min) directly with the FMCSA.
The BorderConnect Connection
While you do not typically enter your MC Number on every eManifest, it is the "invisible key" that makes your border crossing possible.
1. Prerequisite for SCAC
You cannot obtain a Standard Carrier Alpha Code (SCAC)—which is mandatory for filing ACE eManifests—without an active MC Number. The NMFTA verifies your authority before issuing the code.
2. Truck Profile Compliance
In BorderConnect, your DOT Number is often entered on the Truck Profile. However, if that truck is leased onto another company, it is operating under that company's MC Authority. Ensure your driver knows whose name is on the door!
3. Checking Your Status
If your driver is stopped at the border and told "Your Authority is Inactive," you can check the real-time status using the SAFER Web Company Snapshot.
Go to: sa f e r.fmcsa.dot.gov > Company Snapshot > Search by MC Number.