IBAN stands for International Bank Account Number.
IBANs make it easier to send or receive funds from overseas. They don’t replace your sort code and account number; they contain extra characters that help overseas banks identify your account.

What do IBAN numbers look like?
Here’s how an IBAN might look for a bank account in Germany:

IBAN (electronic format)
DE95123467890987654321

IBAN (human-readable format)
DE95 1234 6789 0987 6543 21

What is a German IBAN number made up of?
DE  95  12346789  0987654321

[2-character Country Code]
[2-digit IBAN Checksum]
[8-digit BLZ (Bankleitzahl / Sort Code)]
[10-digit Account Number]