No, not all bank accounts globally possess an International Bank Account Number (IBAN), though they are standard across many jurisdictions. IBAN structures are legally mandatory or widely adopted across the European Union, the United Kingdom, the Middle East, and numerous countries adhering to ECISS standards to streamline cross-border and domestic electronic payments. Conversely, countries like the United States and Canada do not use IBANs for domestic banking, relying instead on domestic routing numbers and standard account numbers for wire transfers and automated clearing house transactions.