DMV: Intrastate and Interstate DOT Numbers

 Intrastate and Interstate DOT Numbers



How do I apply for an Intrastate or Interstate DOT Number?

You must apply online at


How do I update my Intrastate or Interstate DOT Number?

You must update your MCS-150 form online at
  • Interstate DOT numbers must be updated every year.
  • Intrastate DOT numbers must be updated every 2 years.

How do I re-activate my existing Interstate DOT Number?

If you have any questions on your Interstate DOT number, please call 1-800-832-5660.

How do I re-activate my existing Intrastate DOT Number (CT Only)?

Fax a valid 'Acord 25' Certificate of Liability Insurance form along with the completed MCS-150 form to the CT DMV at 860-263-5587 or mail to:


Department of Motor Vehicles

60 State Street

Wethersfield, CT 06161

Room 145 Attn: DOT Number Unit


There is no public access to the DOT Number Unit. All transactions must be done via fax or mail.


All Intrastate motor carriers with an inactive USDOT number must submit the MCS150 with proof of insurance (Acord 25 certificate of liability) for processing.


You are required to send proof of insurance in the form of a Certificate of Liability 'Acord 25' at least once every year to be in compliance.  On the Acord 25 Certificate, the 'certificate holder' must list the State of Connecticut Department of Motor Vehicles, 60 State Street, Wethersfield, CT 06161. 

DMV needs to see the combined single limit of the Auto Liability:

  • If the policy reads “Any Auto,” the vehicles do not have to be listed on the certificate. 
  • If the policy reads “Scheduled Autos,” the vehicles must be listed in the description by make, model, vehicle identification number and year.

Please allow 7-10 days after you submit the above documents for reactivation of your DOT Number.


For access to your USDOT record please go online to and request a PIN number  You will need PIN number to update your USDOT number information every 2 years or immediately if there are any changes.


However, the certificate of liability must still be sent to the Department of Motor Vehicles, Insurance Compliance Unit once every year. This may be faxed to 860-263-5550 or emailed to


Failure to comply may result in inactivation of your DOT Number.


Pursuant to C.G.S. 14-163c , all Connecticut motor carriers must display their legal name or single trade name and their DOT number on each side of the power unit. The DOT number must be preceded by “US DOT” and, if you are an intrastate carrier, followed by “CT”.  Example: "US DOT 1234567 CT"   


Whether your company operates intrastate, meaning, you conduct business solely within Connecticut or operates interstate, you conduct business in other states; you must obtain your DOT number directly online at  If you have any questions regarding the federal website, please call 1-800-832-5660.

Any company revoked as an interstate motor carrier is not eligible to become an intrastate motor carrier until the Federal Motor Carrier Safety Administration has lifted the revoked status.

You are a motor carrier who must obtain an Intrastate DOT number if you operate any motor vehicle that is:

  1. Engaged in intrastate commerce and has a gross vehicle weight rating or gross combination weight rating or gross vehicle weight or gross combination weight of eighteen thousand one (18,001) or more pounds; or,
  2. Used in the transportation of hazardous materials in a quantity requiring placarding; or,
  3. Designed or used to transport more than eight passengers, including the driver, for compensation, or is designed or used to transport more than fifteen passengers, including the driver, and is not used to transport passengers for compensation.

CGS 14-163c lists the Federal Motor Carrier Safety Regulations and the Hazardous Materials Regulations adopted by the State.  Both Interstate and Intrastate motor carriers are subject to these laws, and it is your responsibility to comply with all state and federal laws and regulations pertaining to the operation of motor vehicles in intrastate or interstate commerce. 


Content Last Modified on 7/29/2015 10:46:15 AM