Argentine CBU generator and validator
Generate 22-digit Argentine CBU bank account test numbers with valid check digits and real bank codes, and validate any CBU showing its bank.
Generated numbers are fictitious data for software testing: they have a valid format and check digit, but do not belong to real people, accounts or cards. Do not use them for real transactions.
Generate
Validate
How it works
Pick a bank (or let it be random) and how many you need, and get CBU numbers whose two check digits follow the Argentine Central Bank (BCRA) algorithm: one for the bank and branch block and one for the account number.
The validator checks the length and both check digits and identifies the bank from its first 3 digits. Ideal for testing transfer, direct debit and account opening flows.
Frequently asked questions
How is a CBU structured?
22 digits: 3 for the bank, 4 for the branch, 1 check digit for the first block, 13 for the account number and 1 check digit for the second block.
Can I transfer money to a generated CBU?
No. These are test numbers that do not belong to real accounts. Never use them for real transactions.
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