If merchant needs to provide the Bank ID to avoid Debit blocks from one of their customers the numbering convention is as show here:
...
9 + 0’s + MID = total of 10 digits.
Additional information: ACH Debit Block will help protect your business against unauthorized ACH transactions. ACH Debit Block allows you to block all electronic drafts or specify which companies are authorized to post debits to your accounts while automatically blocking those that are not authorized