Request a 18xy short number (directory enquiry service)

Service description

Request a 18xy short number for a directory enquiry service to assist customers looking for a certain telephone number.

18xy short numbers are four-digit short numbers which can be requested by telephone service providers or private businesses to offer directory enquiry services via the Swiss public telephone directories. 

Please note the following when ordering a 18xy short number:

  • The service must be available at all times (24/7/365) throughout all of Switzerland and in the three official languages (German, French, Italian).
  • The provision of directory enquiry services for international subscriber directories is optional.
  • The personal data of subscribers who have chosen to be unlisted must not be disclosed.
  • OFCOM publishes the available and allocated 18xy short numbers and the addresses of their holders via its service Search for short numbers.  

Do you have any questions or comments about the 'Request a 18xy short number' service? 

Contact us using the service Contact for questions about telecom services

Support - Contact

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

Tel.: +41 58 460 56 41
Contact form