T-Mobile Slovensko, a.s.
- Slovakia's mobile phone operator offering digital GSM network (900 a 1800 MHz), public data network and NMT analog network. Company is part of Deutsche Telekom group.
- http://www.t-mobile.sk/

Orange Slovensko, a.s.
- Mobile operator covering over 95% of Slovakia offering both prepaid and postpaid programs. Part of Orange SA and France Telecom Group.
- http://www.orange.sk/

Slovenske Telecom, a.s.
- National fixed-line telephone provider. Business and residential services, company details. Part of Deutsche Telecom AG group.
- http://www.telecom.sk/