As of 2015, the U.S. Department of Transportation's primary customer service telephone number is 202-366-4000. Different administrative branches of the USDOT have separate customer service numbers. The Federal Transit Administration's telephone number is 202-366-4043, and the National Highway Traffic Safety Administration's number is 888-327-4236.
The Federal Motor Carrier Safety Administration information telephone number is 800-832-5660. Individuals can call the telephone number to request information about USDOT numbers and number status, as well as to inquire about licensing and insurance information. The FMCSA consumer complaint number is 888-368-7238. Representatives handle calls regarding passenger goods, hazardous materials, safety and drivers.
The customer service number for the Federal Aviation Administration is 866-835-5322. Representatives field calls about maintenance issues, low-flying aircraft, violations of FAA internal policy and allegations of harassment and misconduct by FAA employees.