Carrier vetting guides

Last updated: November 9, 2026. General information, not legal advice.

Short, practical guides for freight brokers and the people who build their tools. General information, not legal advice.

• How to find a USDOT number from an MC number
  Turn a docket number from a rate confirmation into the USDOT number, and what to check next.
• Chameleon carriers: what they are and how to check for one
  How FMCSA's published method flags shared identifiers, and how much a flag really means.
• FMCSA stopped updating authority and insurance files
  What froze on May 14, 2026, who is affected, and what to confirm before you tender a load.
• After Montgomery: what a carrier-selection file should show
  What the Supreme Court decided on broker negligent selection, and what a documented file contains.
• Carrier vetting API quickstart for TMS and broker tools
  A five-call vetting flow with curl examples and costs, for developers.