Your new gomoney account number is a NUBAN unique identifier - It's a 10-digit uniform bank account number for interbank transactions. You can find this number on your app's homepage by clicking on “account details”.
Your phone number without the first zero will still serve as your account number for ecosystem transactions. However, from the 30th of November, 2020, your phone numbers will no longer work for interbank transactions, only your NUBAN number will be functional.
To learn more about your NUBAN account number.