DOT numbers: Interstate commercial vehicles

If you operate a commercial vehicle across state lines, you must have a United States Department of Transportation (USDOT) number.

How to apply for a DOT number

To get a USDOT number, submit the following completed forms to the Federal Motor Carrier Safety Administration (FMCSA):

  • Motor Carrier Identification Report (MCS-150).
  • Safety Certification Application (MCS-150A).

How to get a copy of the forms

Washington Healthcare Finder
Access Washington – official state government website