About this Generator
This tool generates valid Argentine CBU (Clave Bancaria Uniforme) numbers that comply with the official format and validation rules set by BCRA.
The generator creates CBUs following the official structure and includes valid check digits calculated using the BCRA algorithm.
Generated CBUs are for testing purposes only. While they follow the correct format and pass validation checks, they are not officially registered numbers.
About Argentine CBU Generator
Generated CBUs follow the official 22-digit structure: • First block: Bank code (3) + Branch code (4) + Check digit (1) • Second block: Account number (13) + Check digit (1)
Each generated CBU includes: • Valid bank codes from the BCRA registry • Properly calculated check digits using the 7139713 pattern for the first block • Second block verification using the 3971397139713 pattern
To verify an existing CBU number, you can use our Argentine CBU Verifier