An MC number (Motor Carrier number) is an operating-authority ID issued by the FMCSA to carriers and brokers that transport regulated goods or passengers across state lines for hire. It’s free to look up.
What is a USDOT number?
An MC (Motor Carrier) number, also called an MC docket number, is granted by the FMCSA to for-hire carriers and freight brokers that operate in interstate commerce moving federally regulated commodities. It proves a company is authorized to operate — brokers and shippers check it before doing business.
Who needs an MC number?
You typically need an MC number if you: operate for-hire across state lines transporting regulated commodities, are a freight broker or freight forwarder, or transport passengers in interstate commerce. Carriers hauling only exempt commodities or operating solely intrastate may not need one — but almost always still need a USDOT number.
How to look up an MC number (free)
You can verify any MC number for free through the official FMCSA systems:
- Go to the FMCSA SAFER Company Snapshot → safer.fmcsa.dot.gov
- Search by MC number, USDOT number, or company name
- Check authority status, insurance, and safety data
For carrier authority and insurance detail, the FMCSA L&I (Licensing & Insurance) system also provides official records.
What an MC number lookup shows
| Field | What it tells you |
|---|---|
| Authority type | Common / contract / broker |
| Authority status | Active / pending / revoked |
| Insurance on file | BIPD / cargo coverage |
| USDOT link | Connected safety record |
Why brokers check MC numbers (fraud prevention)
Freight fraud and identity theft are rising in 2026. Before booking a carrier, brokers verify the MC number is active, insurance is current, and the details match — mismatches (shared phone numbers across MC numbers, sudden name changes, brand-new authority) are common fraud signals.
MC number vs USDOT number
An MC number = permission to operate for hire across state lines. A USDOT number = the carrier’s safety/registration identifier. Many operations need both. See USDOT Number Lookup.
Frequently asked questions
Is an MC number lookup free? Yes — operating authority and insurance status are public through FMCSA.
Do I need both an MC and a USDOT number? Often yes. For-hire interstate carriers of regulated goods usually need both.
How current is the data? FMCSA records update daily.
Internal links: USDOT Number Lookup · SCAC Code Lookup · SCAC vs USDOT vs MC
Verify a carrier’s SCAC code → SCAC Code Lookup