Billing Phone Number – 1-800-364-3400
Billing Address – P.O. Box 145496 Cincinnati, OH 45250-5496
General Website – https://www.cinfin.com/
Online Billing – https://onlineservice.cinfin.com/b2c/Account_Self_Service/QuickPayment.aspx
Online Payment Support – 1-888-242-0888