FMCSA operating authority comparisons
Plain-English, side-by-side breakdowns of the operating-authority concepts new motor carriers, brokers, and freight forwarders most often confuse — so you file for the right authority the first time. 8 comparisons.
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MC Number vs DOT Number
A USDOT number is the FMCSA carrier identifier under 49 CFR §390.19T. An MC number is operating authority under 49 USC §13902.
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DOT Number vs MC Number vs MX Number
USDOT is the carrier-existence ID, MC is operating authority for US and Canadian carriers, and MX is the Mexican cross-border equivalent.
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Common Carrier MC vs Broker MC
A common-carrier MC physically transports freight; a broker MC arranges transportation between shippers and carriers without owning equipment.
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Common Carrier vs Contract Carrier
Common carriers hold out to the public under published tariffs; contract carriers haul under privately negotiated contracts. Both file OP-1.
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Contract Carrier vs Private Fleet
A contract-carrier MC hauls for compensation under shipper contracts; a private fleet hauls only its own freight — USDOT required, MC not.
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For-Hire vs Private Authority
For-hire carriers haul for compensation and need MC authority under 49 USC §13902. Private carriers move only their own freight — USDOT only.
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MC Without DOT vs MC With DOT
You cannot have an MC without a USDOT — the OP-1 requires a USDOT first. The MC is the operating-authority overlay on the §390.19T carrier ID.
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URS vs Legacy OP-1 Application
URS (Unified Registration System) was the FMCSA portal that issued USDOT and MC together from 2017 until Motus (motus.dot.gov) replaced it on May 14, 2026.
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$199 service fee + the $300 FMCSA filing fee. OP-1 submitted within 24 hours, MC number typically active in 3–6 weeks.
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