Account number

Account Number

An account number is a unique identifier assigned to a financial account, such as a bank account, credit card account, or investment account, by a financial institution. Account numbers are used to manage and track transactions within the account.

Overview

An account number is typically composed of a series of digits, and may also include letters or other symbols. The length and format of account numbers can vary widely between different financial institutions. Some institutions use a simple sequential numbering system, while others use complex algorithms to generate unique account numbers.

Account numbers are used in conjunction with a routing number or sort code to facilitate electronic transactions, such as wire transfers or direct deposits. They are also used to identify the account when making deposits or withdrawals at a bank branch or ATM.

Security

Because account numbers are used to access financial accounts, they are considered sensitive information. Financial institutions and consumers must take steps to protect account numbers to prevent unauthorized access to accounts. This can include using secure methods of communication when providing account numbers, and regularly monitoring account activity for signs of identity theft or fraud.

See also

• Bank account
• Credit card number
• Routing number
• Sort code
• Identity theft
• Fraud