Term
MC number (operating authority)
The FMCSA operating authority that for-hire interstate carriers, brokers and freight forwarders need in addition to a USDOT number.
VAULT 33|27 · Updated 12 November 2026 · 1 min read
What it means
FMCSA states that for-hire interstate motor carriers, brokers and freight forwarders are required to have operating authority in addition to a USDOT number. The authority is often called an MC number, and can also appear as an FF or MX number depending on the type.
Why it matters for your business
Brokers and shippers check active authority before tendering loads. Showing it on your website and carrier packet is a basic trust signal for any for-hire carrier or brokerage.
Sources
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