United States Banking Institution Account Number Regular Expression?

Question

I have been tasked to \"verify\" the length of a U.S. Banking Institution ACCOUNT NUMBER for a web app I\'m developing. I cannot find anything through SOF, Google, Fed reser

Answer 1

Don't you mean International Bank Account Number? If yes, this is a regex for IBAN (all IBANs):

[a-zA-Z]{2}[0-9]{2}[a-zA-Z0-9]{4}[0-9]{7}([a-zA-Z0-9]?){0,16}

UPDATE: Actually, according to Wikipedia: Banks in the United States do not provide IBAN format account numbers. Any adoption of the IBAN standard by U.S. banks would likely be initiated by ANSI ASC X9, the U.S. financial services standards development organization but to date it has not done so. Hence payments to U.S. bank accounts from outside the U.S. are prone to errors of routing.