Contact for questions about telecom services

Service description

Contact us if you have any questions, comments or complaints about telecom services. The relevant office will be pleased to handle your request.

Please read the FAQs beforehand. You may already find an answer to your question there. 

On this page we can accept your questions and comments about the following topics: 

• Individual numbers (0800, 084x, 090x)
• Short numbers (Carrier Selection Codes (CSC), 1xy, 18xy, 116xyz, SMS/MMS)
• Number blocks
• Other numbers and codes such as National Signalling Point Codes (NSPC), Mobile Network Codes (MNC), Issuer Identifier Numbers (IIN) etc.
• Service providers
• Other matters concerning telecom services 

Support - Contact

Federal Office of Communications
TP-NA
Zukunftstrasse 44
Postfach 256
CH-2501 Biel/Bienne

Tel.: +41 58 460 56 40
Email: eofcom@bakom.admin.ch  
Contact form