What are the barcode prefix(s) for every CUNY Institution?
Each library's patron barcodes begin with a specific 5-digit code. The 5 digits identify the user's campus. There may be other groups/users identified by initial barcodes. To be safe, the Aleph patron system should be checked before considering a new 5-digit code.
For a list of the barcode prefixes, please see Libraries > Barcode Prefixes. You must be logged in to the OLS Support Site to see the 5-digit codes.