Q. How can I obtain a listing of all the trucking companies operating in the U.S.?
The information you have requested is available as open government data. Please visit https://ai.fmcsa.dot.gov/SMS/Tools/Downloads.aspx and download the "Motor Carrier Census Information" file. The file contains US DOT Number, Company Name, Address, Contact Information, basic information regarding number of power units and drivers, and other registration information and is updated on a monthly basis.
The DOT Open Data Team