Colorado Department of Revenue
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Important Phone Numbers

Subject

Agency

Telephone

Operating Authority 

Public Utilities Commission 

(303)894-2000  

Clean Air Act

MV Emissions Section

(303)205-5603

Commercial Drivers License

MV CDL Section 

(303)205-5983 

Intelligent Transp. Systems

CDOT

(303)757-9801

Efficiency Act (*ISTEA)

CDOT

(303)757-9801

Interstate Registration

MCS IRP Section 

(303)205-5602 

Intrastate Registration

MV Registration Section

County Registration Offices

(303)205-5607

Office Locations

Longer Combination Vehicles

CDOT Extra Legal Permitting 

(303)757-9539

Unified Carrier Registration (UCR)

Public Utilities Commission

(303)894-2000

Interstate Fuel Tax Agr. (IFTA)

Fuel Section

(303)205-8205