For CEDEX, the INSEE code entered is that of the municipality where the company is located.
Exceptionally, it may therefore be an INSEE code of a different department from the CEDEX code, especially when the company’s common seat is declared in the municipality of establishment. These cases remain limited.
Thus we can note the presence of municipalities of different departments between line 5 and line 6 but from an SI point of view, nothing prevents a client domiciled in one department having a CEDEX code of another department.