A branch sort code is a six-digit numerical code that identifies the specific bank and the specific branch where the bank account was initially opened. It is used in the UK banking system to indicate where payment is going or coming from. The sort code is usually formatted as three pairs of numbers, for example, 12-34-56. The first two digits identify which bank it is, and the last four digits identify the specific branch where the account is held. Sort codes are used to route money transfers between financial institutions in the United Kingdom and in the Republic of Ireland. Every bank account in the UK is assigned a sort code, and it is required when making domestic or international wire transfers. It is important to note that while sort codes are often used alongside account numbers, they each have a different function. Account numbers identify an individuals savings or checking account, while sort codes ensure that a bank will correctly move money over from one account to another.