Byline Bank At Byline, we’re a bank that believes in putting our name behind everything we do and we’re here to roll up our sleeves and help our customers write their stories.   Byline Bank Service Telephone Contact Info Main Office: (773) 244-7000 Report Debit Card lost/stolen: (800) 236-2442 Zelle®, Retail Online Banking: (773) 244-7000 Online Banking Login How to Log In 1. Visit the bank’s website https://www.bylinebank.com/.     2. The Login is located to the right part of…