http://www.bbb.ch
http://www.comparis.ch
http://www.tel-tarif.ch
http://www.orange.ch
http://www.sunrise.ch
http://www.swisscom.ch
http://www.tele2.ch
http://www.econophone.ch
http://www.multilink.ch
http://www.systems.de
http://www.vtx.ch
http://www.datanetworks.ch
http://www.cweurope.com
Lexikon