A DOT (Department of Transportation) number search is most commonly done to search the Safety and Fitness Electronic Records (SAFER) system. According the U.S. Department of Transportation, this record contains a company's identification, size, commodity information and safety record.
An electronic record of a company via a DOT number search can also include a safety rating and crash information. A DOT number is also known as a USDOT number on official forms from the U.S. Department of Transportation. In addition to a DOT number, an MC/MX number or company name can be used to search through the SAFER system to pull the same records. The Federal Motor Carrier Safety Administration maintains the latest information on DOT numbers, including the appropriate forms to fill out when applying for a DOT number, on its website.