What is oklahoma unemployment phone number? The customer support phone number of Oklahoma Unemployment is 525-1500, +1-800-555-1554 (Click phone number to call).What is the oklahoma state code? The state of Oklahoma is served by the following area codes: 405, which serves central Oklahoma including Oklahoma City (original area code in 1947) 580, which serves western and southern Oklahoma (split from 405 in 1997)What is the phone number for the oklahoma dmv? Oklahoma Dmv Contact Phone Number is : (918) 259-0764. and Address is 1635 S Main Street, Broken Arrow, Oklahoma 74012, United States.