Carrier Selection Code (free choice of provider)

Use of a carrier selection code (CSC) allows subscribers to choose their provider for national or international calls. CSCs are composed of 5 digits and are allocated by OFCOM to telecommunication services providers.

List of available or allocated CSC

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Guide to the implementation

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Technical prescriptions

This document is available in German, French and Italian only. Please click on the desired language above in the Navigation Menu.

• SR 784.101.113/1.11 The free choice of the provider for national and international connections

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Forms

Information notice on the allocation of carrier selection codes (CSC) (PDF, 85 kB, 01.01.2023)

This document is available in German, French and Italian only. Please click on the desired language above in the Navigation Menu.

• Request for the allocation of Carrier Selection Codes

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Publications

Free choice of carrier (call-by-call)

Last modification 02.03.2022