The USDOT number is a unique code issued by the US Department of Transportation for commercial vehicles that operate across state lines or as part of a federally regulated industry. It helps track the safety record of these vehicles and their operators. The number is a seven-digit code that must be displayed on the exterior of the vehicle along with the carrier’s company name and address. To Obtain a DOT#, Click Here To determine if you need a USDOT number Click Here