What is the routing number for Marshall & Ilsley Corporation?

The routing number for Marshall & Ilsley Corporation, also known as M&I Bank, is a nine-digit code that identifies the specific financial institution for processing electronic transactions. As routing numbers might vary based on the region or branch, it would be ideal to provide the specific location or state to obtain the accurate routing number. M&I Bank operates in multiple states, such as Wisconsin, Arizona, and Minnesota. Therefore, it is recommended to visit the official website of Marshall & Ilsley Corporation or contact their customer service for the precise routing number based on your banking needs.