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Customer Service - 855-660-5862 Online and Mobile Banking - 888-588-2623 To contact a First Financial Bank customer service representative, call toll-free 855-660-5862.
First Financial Bank, Na's routing number (the leftmost number on the bottom of a check) is 74902341. Sometimes, banks have multiple routing numbers for different branches or uses. Please make sure this is the correct routing number for your branch! The main phone number for First Financial Bank, Na is 877-322-9530. The assigned Federal Reserve Office for First Financial Bank, Na is Fed 071000301. A bank's Routing Transit Number (RTN) is a 9-digit code used to identify your bank on checks, direct deposit, bill pay, and in other transactions.