USDOT Number vs MC Number for Bus Companies: What Each One Means
What the USDOT number and the MC (operating authority) number tell you about a bus company, and which one a carrier needs for your trip.
Updated October 25, 2026 · 4 min read
USDOT number
The USDOT number is the carrier’s federal safety ID. FMCSA uses it to track inspections, crashes, audits and the safety rating. Every company on bus.broker has one, and you can search by it.
MC number
The MC (motor carrier) number is the company’s operating authority — permission to carry passengers for hire across state lines. To get it, the company must file proof of insurance with FMCSA. Our profiles show whether the MC number is active.
Which does my trip need?
- Trip crosses a state line (even a short airport run) — the company needs an active MC number.
- Trip stays inside one state — the company follows state rules; a USDOT number is common, but an MC number may not be required.
Follow our 5-step bus company safety checklist before you book.
Find a bus company near you
Every company in our directory is an active FMCSA-registered passenger carrier. Browse by state and city, compare fleets and safety records and contact companies directly.
- Active FMCSA-registered passenger carriers
- USDOT, MC and safety rating shown
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Check a bus company before you book
Look up any USDOT or MC number to see fleet, authority and safety rating on record.
Frequently asked questions
Can a bus company have a USDOT number but no MC number?
Yes. Companies that only run trips inside one state often need a USDOT number (depending on the state) but not an MC number. They cannot legally carry paying passengers across state lines.
Where do I find a bus company’s USDOT number?
It must be shown on both sides of the bus, and the company should give it to you on request. You can also search the company name on bus.broker or FMCSA SAFER.
Does an MC number mean the company is safe?
No. It means the company registered and filed insurance. Check its safety rating, inspection results and out-of-service rate too.
Related guides
- How Much Does a Charter Bus Cost? Pricing by Bus Type (2026 Guide)
- How to Check a Charter Bus Company Before You Book (5-Minute Safety Checklist)
- Bus Types and Sizes: Motorcoach, Minibus, School Bus, Party Bus and Limo Compared
This guide is general information, not legal advice. Rules and rates change — confirm requirements with FMCSA or your state before you book.