When you complete the online registration process, either on your cell phone or via the website, you will be able to see the account number for a few seconds. However, you will not be able to find out your IBAN number until you have been identified. If you don't know if you've already identified yourself or want to learn more about it, click here
When you have been identified, you will receive a welcome email from BBVA. From then on, you will be able to enter your BBVA Private Area with the username and login details you gave in the registration process.