Is my account registered in the national account register?

Your Sogexia account is located in Luxembourg and is natively associated with a Luxembourg IBAN. It is therefore registered, in Luxembourg only, in the national register of Luxembourg accounts.

If you live in France or Belgium, such files also exist (called FICOBA and PCC respectively) but your Sogexia account is not registered in them because it is not located in these countries. 

However, if you request a French IBAN for your Sogexia account in addition to the native Luxembourg IBAN, then your Sogexia account will be registered in the FICOBA in addition to the national register of Luxembourg accounts.