ABA_NUMBER, also known as the bank fraction number or routing transit number , is an optional alphanumeric field used for U.S. Installations.

The ABA number consists of three elements: 
*3 character bank transit
*5 character branch transit 
*1 character check digit. 


----
![Notes|Edit:Internal.ABA_NUMBER] 	
[{InsertPage page='Internal.ABA_NUMBER' default='Click to create a new notes page'}]