DOT numbers
Intrastate commercial vehicles
If you operate a commercial vehicle within Washington State, you may need a U.S. Department of Transportation (USDOT) number. Find out if you need one and how to get it.
Interstate commercial vehicles
If you operate a commercial vehicle across state lines, you must have a U.S. Department of Transportation number. Find out how to get one.
Related information
- How to renew your tabs
- Register your vehicle
- Change your name or address
- Buying or selling a vehicle
- Lost tabs, plates, or titles
- License plates
- Titles
- Fees, taxes, and donations
- For military personnel
- Disabled parking
- Commercial vehicles
- Fuel tax
- Boats
- Recreational vehicles
- Autonomous vehicles
- Vehicle licensing offices
