In The Netherlands, the European rule to use only IBAN for all bank transfer is not applied, yet.
The problem come when you don’t have a national bank account and you need to pay a bill or someone. Usually they provide you only the account number and 90% of the cases without the possibility to ask for the IBAN.
Fortunately exist a IBAN calculator here, which provide you the automatic calculation of IBAN and BIC.
