Contact Us

CUBLine
303-813-2800 (Denver metro area)
1-888-550-2800 (outside Denver metro area)

Mail
UI Operations
PO Box 400
Denver, CO 80201-0400

Telephone
Customer service representatives are available Monday through Friday from 7:30 am to 4:30 pm
Mountain time except on state observed holidays.

English Representatives
303-318-9000 (Denver metro area)
1-800-388-5515 (outside Denver metro area)

Spanish Representatives
303-318-9333 (Denver metro area)
1-866-422-0402 (outside Denver metro area)

Hearing Impaired (TDD)
303-318-9016 (Denver metro area)
1-800-894-7730 (outside Denver metro area)