CSC are five-digit short numbers. They are used exclusively as a prefix to identify the telecommunications service provider to which they are allocated. By dialling a specific CSC before a telephone number, customers can select the holder of that CSC as the carrier for that particular call.
Please note the following when ordering a CSC:
The number of available CSC is limited. You will only be issued multiple CSC if you can demonstrate as a telecommunications service provider that the resulting possible uses are distributed between the different CSC.
Do you have any questions or comments about the 'Request a Carrier Selection Code (CSC)' service?
Contact us using the service Contact for questions about telecom services.