FIRSTBANK ROUTING ABA NUMBER

102103999 routing number is a 9-digit number designed and assigned to Firstbank by The American Bankers Association (ABA) to identify the financial institution upon which a payment was drawn. Firstbank routing numbers are also known as as "ABA numbers", "routing transit numbers" (RTN), or "check routing numbers". Routing numbers depend on the type of transaction made such as reorder Firstbank checks, receive incoming domestic or international wire transfers, use the number for wire transfers to your Firstbank account, or to set up direct deposits. Please call Firstbank representative at (303) 235-1446 for more information.