Special rate numbers

Hi all,

We sometimes need to reach numbers in the 'special' ranges, because in some countries there are companies who use those numbers.
For example, in France there is a prefix which starts with +33890, which is marked as a special rate number.

I know the cost of these calls is higher than a normal call, but since today we cannot reach any of those numbers anymore, and earlier they were just reachable.
Anyone has an idea what to do? Is this a setting we need to change so those numbers are reachable again?

Thanks!