Mainsource*bank Instant

Since the transition, all online banking and customer support functions are handled through First Financial Bank's platforms:

: Contact support immediately at 833-347-7805 during business hours or 855-898-7288 after hours. mainsource*bank

If you are looking to access an old MainSource account or manage current banking needs, you should now use the services provided by First Financial Bank. Transitioning from MainSource to First Financial Since the transition, all online banking and customer

Since the transition, all online banking and customer support functions are handled through First Financial Bank's platforms:

: Contact support immediately at 833-347-7805 during business hours or 855-898-7288 after hours.

If you are looking to access an old MainSource account or manage current banking needs, you should now use the services provided by First Financial Bank. Transitioning from MainSource to First Financial