Important - prepend/append a routing number to destination number

Hi All

Our carrier requested us to add for example 999 to the destination number we want to call to be able to use the Platinum rout, we configured this in termination rates using field prepend, however, it is not working.

Is there a way to do so on trunk or gateway level?

Hello @yazan ,
It should be work with above thing but alternatively you can try Localization and apply to your provider (carrier) so that can be also work.

ASTPP Tutorial: Localizations