度娘了一下,aba number 是美國銀行協(xié)會號碼:Originated by the American Bankers Association, it is the number (usually in the upper right hand portion of the check) which identifies the bank upon which the check is drawn.
主要是美國及北美地區(qū)國家銀行才使用的,國內(nèi)的銀行沒有。估計交行紐約分行就有這東西。