For the US, it is digits only. A change in ASC X9 is required, which is the financial services standard development organisation would have to implement a change in order to allow US Banks to have alphanumeric numbers in Bank Accounts, which they currently do not have.
Can U.S. bank account numbers include alphabetic characters?
Why do banks prohibit storing cash in safe deposit boxes, and how would they know?1 ansWhat happens to funds in forgotten or unclaimed bank accounts?1 ansDoes the money in bank accounts physically exist or only digitally?1 ansCan an illiterate person operating a current account issue a cheque using a thumbprint?1 ans