The country code in an IBAN is a two-letter ISO 3166-1 alpha-2 code that identifies the country where the bank account is registered. This code is essential for:

• Identifying the country of origin
• Determining the IBAN format and length
• Routing international payments

For example:

• DE - Germany
• FR - France
• GB - United Kingdom
• TR - Turkey

Each country has its own specific IBAN format and length requirements based on its banking system structure.