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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.
Bank ABA Numbers. First Financial Bank, Na Routing Number 042200910. Call (877) 322-9530 for wire instructions for domestic wire transfer to and from First Financial Bank, Na, international wire transfer, wire transfer fees and cut off time for wires. FIRST FINANCIAL BANK, NA ROUTING ABA NUMBER. The last reported ABA Number for First Financial Bank, Na is 042200910. According to our bank database, this bank location is a main office and servicing FRB number is 042107068. There are several First Financial Bank, Na routing numbers reported in our bank database.